diff --git a/uniplanWeb/src/app/core/shared/add-button/add-button.ts b/uniplanWeb/src/app/core/shared/add-button/add-button.ts
index 1c66b9f..315b488 100644
--- a/uniplanWeb/src/app/core/shared/add-button/add-button.ts
+++ b/uniplanWeb/src/app/core/shared/add-button/add-button.ts
@@ -12,7 +12,7 @@ import { MatIconModule } from '@angular/material/icon';
 export class AddButton {
   @Output() addClicked = new EventEmitter<void>();
 
-  onClick(): void {
+  public onClick(): void {
     this.addClicked.emit();
   }
 }
diff --git a/uniplanWeb/src/app/core/shared/add-form/add-form.ts b/uniplanWeb/src/app/core/shared/add-form/add-form.ts
index bb4b843..91eba22 100644
--- a/uniplanWeb/src/app/core/shared/add-form/add-form.ts
+++ b/uniplanWeb/src/app/core/shared/add-form/add-form.ts
@@ -12,7 +12,7 @@ import { MatInputModule } from '@angular/material/input';
   styleUrl: './add-form.scss',
 })
 export class AddForm {
-  @Input() title: string = '';
+  @Input() public title: string = '';
 
-  @Output() saveClicked = new EventEmitter<void>();
+  @Output() public readonly saveClicked :EventEmitter<void> = new EventEmitter<void>();
 }
diff --git a/uniplanWeb/src/app/core/shared/delete-form/delete-form.ts b/uniplanWeb/src/app/core/shared/delete-form/delete-form.ts
index d0eb4b4..d97f049 100644
--- a/uniplanWeb/src/app/core/shared/delete-form/delete-form.ts
+++ b/uniplanWeb/src/app/core/shared/delete-form/delete-form.ts
@@ -11,7 +11,7 @@ import { MatInputModule } from '@angular/material/input';
   styleUrl: './delete-form.scss',
 })
 export class DeleteForm {
-  @Input() title: string = '';
+  @Input() public title: string = '';
 
-  @Output() deleteClicked = new EventEmitter<void>();
+  @Output() public readonly deleteClicked:EventEmitter<void> = new EventEmitter<void>();
 }
diff --git a/uniplanWeb/src/app/core/shared/edit-form/edit-form.ts b/uniplanWeb/src/app/core/shared/edit-form/edit-form.ts
index 6947946..42f33df 100644
--- a/uniplanWeb/src/app/core/shared/edit-form/edit-form.ts
+++ b/uniplanWeb/src/app/core/shared/edit-form/edit-form.ts
@@ -10,7 +10,7 @@ import { MatDialogModule } from '@angular/material/dialog';
   styleUrl: './edit-form.scss',
 })
 export class EditForm {
-  @Input() title: string = '';
+  @Input() public title: string = '';
 
-  @Output() saveClicked = new EventEmitter<void>();
+  @Output() public readonly saveClicked:EventEmitter<void> = new EventEmitter<void>();
 }
diff --git a/uniplanWeb/src/app/core/shared/filters-form/filters-form.ts b/uniplanWeb/src/app/core/shared/filters-form/filters-form.ts
index 53e9bb0..5c65f36 100644
--- a/uniplanWeb/src/app/core/shared/filters-form/filters-form.ts
+++ b/uniplanWeb/src/app/core/shared/filters-form/filters-form.ts
@@ -13,20 +13,20 @@ import { MatSelectModule } from '@angular/material/select';
   styleUrl: './filters-form.scss',
 })
 export class FiltersForm {
-  @Input() label = '';
+  @Input() public label: string = '';
 
-  @Input() options: string[] = [];
+  @Input() public options: string[] = [];
 
-  @Input() objectOptions: { id: string; name: string }[] = [];
+  @Input() public objectOptions: { id: string; name: string }[] = [];
 
-  @Input() selected = '';
-  @Output() selectionChange = new EventEmitter<string>();
+  @Input() public selected = '';
+  @Output() public readonly selectionChange = new EventEmitter<string>();
 
-  onChange(value: string) {
+  public onChange(value: string) {
     this.selectionChange.emit(value);
   }
 
-  isObjectMode(): boolean {
+  public isObjectMode(): boolean {
     return this.objectOptions && this.objectOptions.length > 0;
   }
 }
diff --git a/uniplanWeb/src/app/core/shared/input-filter/input-filter.ts b/uniplanWeb/src/app/core/shared/input-filter/input-filter.ts
index 1f70c70..a0a821b 100644
--- a/uniplanWeb/src/app/core/shared/input-filter/input-filter.ts
+++ b/uniplanWeb/src/app/core/shared/input-filter/input-filter.ts
@@ -12,7 +12,7 @@ import { MatFormField, MatInputModule } from '@angular/material/input';
   styleUrl: './input-filter.scss',
 })
 export class InputFilter {
-  @Input() label: string = '';
-  @Input() searchText = '';
-  @Output() searchTextChange = new EventEmitter<string>();
+  @Input() public label: string = '';
+  @Input() public searchText: string = '';
+  @Output() public readonly searchTextChange: EventEmitter<string> = new EventEmitter<string>();
 }
diff --git a/uniplanWeb/src/app/core/shared/main-panel/main-panel.ts b/uniplanWeb/src/app/core/shared/main-panel/main-panel.ts
index d205b1b..a56abaa 100644
--- a/uniplanWeb/src/app/core/shared/main-panel/main-panel.ts
+++ b/uniplanWeb/src/app/core/shared/main-panel/main-panel.ts
@@ -15,6 +15,8 @@ import { StudentFilters } from '../../../features/student/student-filters/studen
 import { MajorElm } from '../../interfaces/major-elm';
 import { MajorService } from '../../../features/major/major-service';
 import { FacultyService } from '../../../features/faculty/faculty-service';
+import {StudentElm} from '../../interfaces/student-elm';
+import {FacultyElm} from '../../interfaces/faculty-elm';
 
 @Component({
   selector: 'app-main-panel',
@@ -34,55 +36,55 @@ import { FacultyService } from '../../../features/faculty/faculty-service';
   styleUrl: './main-panel.scss',
 })
 export class MainPanel {
-  currentView = 'home';
+  protected currentView: string = 'home';
 
-  majors: MajorElm[] = [];
-  students = ELEMENT_STUDENT_DATA;
+  protected majors: MajorElm[] = [];
+  protected students: StudentElm[] = ELEMENT_STUDENT_DATA;
 
-  searchText = '';
-  searchFacNum = '';
-  searchMajor = '';
-  selectedStudentSubtype = '';
-  studentSubtypes: string[] = [];
+  protected searchText: string = '';
+  protected searchFacNum: string = '';
+  protected searchMajor: string = '';
+  protected selectedStudentSubtype: string = '';
+  protected studentSubtypes: string[] = [];
 
-  selectedFaculty = '';
-  selectedType = '';
-  selectedSubtype = '';
+  protected selectedFaculty: string = '';
+  protected selectedType: string = '';
+  protected selectedSubtype: string = '';
 
-  faculties: { id: string; name: string }[] = [];
-  types: string[] = [];
-  subtypes: string[] = [];
+  protected faculties: { id: string; name: string }[] = [];
+  protected types: string[] = [];
+  protected subtypes: string[] = [];
 
-  private facultyMap = new Map<string, string>();
+  private facultyMap: Map<string, string> = new Map<string, string>();
 
-  constructor(
+  public constructor(
     private viewService: ViewService,
     private majorService: MajorService,
     private facultyService: FacultyService
   ) {
-    this.viewService.currentView$.subscribe((view) => {
+    this.viewService.currentView$.subscribe((view: string): void => {
       this.currentView = view;
     });
   }
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.loadMajorFilters();
     this.loadStudentFilters();
 
-    this.majorService.refreshNeeded.subscribe(() => {
+    this.majorService.refreshNeeded.subscribe((): void => {
       this.loadMajorFilters();
     });
 
-    this.viewService.currentView$.subscribe((view) => {
+    this.viewService.currentView$.subscribe((view: string): void => {
       this.currentView = view;
     });
   }
 
   private loadMajorFilters(): void {
-    this.facultyService.getFaculties().subscribe((faculties) => {
-      this.facultyMap = new Map(faculties.map((f) => [f.id, f.facultyName]));
+    this.facultyService.getFaculties().subscribe((faculties: FacultyElm[]): void => {
+      this.facultyMap = new Map(faculties.map((f: FacultyElm): [any, any] => [f.id, f.facultyName]));
 
-      this.majorService.getMajors().subscribe((data) => {
+      this.majorService.getMajors().subscribe((data: MajorElm[]): void => {
         this.majors = data;
 
         const filterOptionsMajor = MajorTable.getFilterOptions(
diff --git a/uniplanWeb/src/app/core/shared/main-panel/view.service.ts b/uniplanWeb/src/app/core/shared/main-panel/view.service.ts
index bbc6220..3455f8a 100644
--- a/uniplanWeb/src/app/core/shared/main-panel/view.service.ts
+++ b/uniplanWeb/src/app/core/shared/main-panel/view.service.ts
@@ -3,10 +3,10 @@ import { BehaviorSubject } from 'rxjs';
 
 @Injectable({ providedIn: 'root' })
 export class ViewService {
-  private viewSubject = new BehaviorSubject<string>('home');
-  currentView$ = this.viewSubject.asObservable();
+  private viewSubject: BehaviorSubject<string> = new BehaviorSubject<string>('home');
+  currentView$: any = this.viewSubject.asObservable();
 
-  public setView(view: string) {
+  public setView(view: string): void {
     this.viewSubject.next(view);
   }
 }
diff --git a/uniplanWeb/src/app/core/shared/navmenu-component/navmenu-component.ts b/uniplanWeb/src/app/core/shared/navmenu-component/navmenu-component.ts
index d28b20a..7c6412f 100644
--- a/uniplanWeb/src/app/core/shared/navmenu-component/navmenu-component.ts
+++ b/uniplanWeb/src/app/core/shared/navmenu-component/navmenu-component.ts
@@ -13,25 +13,25 @@ import { LoginAuthService } from '../../../services/login-auth-service';
   styleUrls: ['./navmenu-component.scss'],
 })
 export class NavmenuComponent implements OnInit {
-  isSidebarCollapsed = false;
-  isMobileView = window.innerWidth <= 768;
+  protected isSidebarCollapsed: boolean = false;
+  protected isMobileView: boolean = window.innerWidth <= 768;
 
   constructor(
-    public authService: LoginAuthService,
-    public viewService: ViewService
+    protected authService: LoginAuthService,
+    private readonly viewService: ViewService
   ) {}
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.checkViewport();
   }
 
   @HostListener('window:resize', ['$event'])
-  onResize(event: Event): void {
+  protected onResize(event: Event): void {
     this.checkViewport();
   }
 
   private checkViewport(): void {
-    const isNowMobile = window.innerWidth <= 768;
+    const isNowMobile: boolean = window.innerWidth <= 768;
     if (this.isMobileView !== isNowMobile) {
       this.isMobileView = isNowMobile;
     }
@@ -40,23 +40,23 @@ export class NavmenuComponent implements OnInit {
     }
   }
 
-  toggleSidebar(): void {
+  protected toggleSidebar(): void {
     this.isSidebarCollapsed = !this.isSidebarCollapsed;
   }
 
-  onHomeClick(): void {
+  protected onHomeClick(): void {
     this.viewService.setView('home');
   }
 
-  onFacultyClick(): void {
+  protected onFacultyClick(): void {
     this.viewService.setView('faculty');
   }
 
-  onMajorClick(): void {
+  protected onMajorClick(): void {
     this.viewService.setView('major');
   }
 
-  onStudentClick(): void {
+  protected onStudentClick(): void {
     this.viewService.setView('student');
   }
 }
diff --git a/uniplanWeb/src/app/features/faculty/faculty-add-form/faculty-add-form.ts b/uniplanWeb/src/app/features/faculty/faculty-add-form/faculty-add-form.ts
index 81d040a..340320f 100644
--- a/uniplanWeb/src/app/features/faculty/faculty-add-form/faculty-add-form.ts
+++ b/uniplanWeb/src/app/features/faculty/faculty-add-form/faculty-add-form.ts
@@ -30,10 +30,10 @@ import {
   styleUrl: './faculty-add-form.scss',
 })
 export class FacultyAddForm implements OnInit {
-  facultyName = '';
-  location = '';
-  universityId = '';
-  universities: UniversityElm[] = [];
+  protected facultyName: string = '';
+  protected location: string = '';
+  protected universityId: string = '';
+  protected universities: UniversityElm[] = [];
 
   constructor(
     private dialogRef: MatDialogRef<AddForm>,
@@ -41,18 +41,18 @@ export class FacultyAddForm implements OnInit {
     private universityService: UniversityService
   ) {}
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.universityService.getAllUniversities().subscribe({
-      next: (data) => {
+      next: (data: UniversityElm[]): void => {
         this.universities = data;
       },
-      error: (err) => {
+      error: (err: any): void => {
         console.error('Failed to load universities', err);
       },
     });
   }
 
-  save() {
+  protected save(): void {
     if (!this.facultyName.trim()) {
       alert('Please enter faculty name.');
       return;
@@ -70,11 +70,11 @@ export class FacultyAddForm implements OnInit {
     };
 
     this.facultyService.createFaculty(newFaculty).subscribe({
-      next: (response) => {
+      next: (response: any): void => {
         console.log('Faculty created:', response);
         this.dialogRef.close(response);
       },
-      error: (err) => {
+      error: (err: any): void => {
         console.error('Failed to add faculty', err);
         alert('Failed to add faculty.');
       },
diff --git a/uniplanWeb/src/app/features/faculty/faculty-delete-form/faculty-delete-form.ts b/uniplanWeb/src/app/features/faculty/faculty-delete-form/faculty-delete-form.ts
index 6a27b3f..00d2ed6 100644
--- a/uniplanWeb/src/app/features/faculty/faculty-delete-form/faculty-delete-form.ts
+++ b/uniplanWeb/src/app/features/faculty/faculty-delete-form/faculty-delete-form.ts
@@ -22,12 +22,12 @@ export class FacultyDeleteForm {
     public data: { id: string; facultyName: string }
   ) {}
 
-  deleteFaculty(): void {
+  protected deleteFaculty(): void {
     this.facultyService.deleteFaculty(this.data.id).subscribe({
-      next: () => {
+      next: (): void => {
         this.dialogRef.close(true);
       },
-      error: () => {
+      error: (): void => {
         alert('Възникна грешка при изтриването на факултета.');
       },
     });
diff --git a/uniplanWeb/src/app/features/faculty/faculty-edit/faculty-edit.ts b/uniplanWeb/src/app/features/faculty/faculty-edit/faculty-edit.ts
index da277c9..ebb9c0f 100644
--- a/uniplanWeb/src/app/features/faculty/faculty-edit/faculty-edit.ts
+++ b/uniplanWeb/src/app/features/faculty/faculty-edit/faculty-edit.ts
@@ -30,9 +30,9 @@ import { EditForm } from '../../../core/shared/edit-form/edit-form';
   ],
 })
 export class FacultyEdit {
-  facultyName = '';
-  location = '';
-  universityId = '';
+  protected facultyName: string = '';
+  protected location: string = '';
+  protected universityId: string = '';
 
   constructor(
     private dialogRef: MatDialogRef<EditForm>,
@@ -49,8 +49,7 @@ export class FacultyEdit {
     this.location = data.location;
     this.universityId = data.universityId;
   }
-
-  save() {
+  protected save(): void {
     if (!this.facultyName.trim()) {
       alert('Please enter faculty name.');
       return;
@@ -68,10 +67,10 @@ export class FacultyEdit {
         universityId: this.universityId,
       })
       .subscribe({
-        next: () => {
+        next: (): void => {
           this.dialogRef.close(true);
         },
-        error: () => {
+        error: (): void => {
           alert('Failed to update faculty.');
         },
       });
diff --git a/uniplanWeb/src/app/features/faculty/faculty-options/faculty-options.ts b/uniplanWeb/src/app/features/faculty/faculty-options/faculty-options.ts
index 64ac111..a8dace5 100644
--- a/uniplanWeb/src/app/features/faculty/faculty-options/faculty-options.ts
+++ b/uniplanWeb/src/app/features/faculty/faculty-options/faculty-options.ts
@@ -22,7 +22,7 @@ import { AddButton } from '../../../core/shared/add-button/add-button';
 export class FacultyOptions {
   constructor(private dialog: MatDialog) {}
 
-  openAddForm() {
+  protected openAddForm(): void {
     this.dialog.open(FacultyAddForm, {
       width: '400px',
     });
diff --git a/uniplanWeb/src/app/features/faculty/faculty-service.ts b/uniplanWeb/src/app/features/faculty/faculty-service.ts
index 506fe3e..778f369 100644
--- a/uniplanWeb/src/app/features/faculty/faculty-service.ts
+++ b/uniplanWeb/src/app/features/faculty/faculty-service.ts
@@ -9,14 +9,14 @@ import { FacultyElm } from '../../core/interfaces/faculty-elm';
 export class FacultyService {
   private apiUrl = 'http://localhost:8080/api/faculties';
 
-  refreshNeeded = new Subject<void>();
+  public readonly refreshNeeded = new Subject<void>();
 
   constructor(private http: HttpClient) {}
 
-  getFaculties(): Observable<FacultyElm[]> {
+  public getFaculties(): Observable<FacultyElm[]> {
     return this.http.get<FacultyElm[]>(this.apiUrl).pipe(
-      map((faculties) =>
-        faculties.map((faculty, index) => ({
+      map((faculties: FacultyElm[]) =>
+        faculties.map((faculty: FacultyElm, index: number) => ({
           id: faculty.id,
           facultyName: faculty.facultyName,
           location: faculty.location,
@@ -27,20 +27,20 @@ export class FacultyService {
     );
   }
 
-  createFaculty(faculty: {
+  public createFaculty(faculty: {
     universityId: string;
     facultyName: string;
     location: string;
   }): Observable<any> {
     return this.http.post(`${this.apiUrl}`, faculty).pipe(
-      map((res) => {
+      map((res: Object): Object => {
         this.refreshNeeded.next();
         return res;
       })
     );
   }
 
-  editFaculty(
+  public editFaculty(
     id: string,
     updatedFaculty: {
       universityId: string;
@@ -56,7 +56,7 @@ export class FacultyService {
     );
   }
 
-  deleteFaculty(id: string): Observable<any> {
+  public deleteFaculty(id: string): Observable<any> {
     return this.http.delete(`${this.apiUrl}/${id}`).pipe(
       map((res) => {
         this.refreshNeeded.next();
diff --git a/uniplanWeb/src/app/features/major/major-add-form/major-add-form.ts b/uniplanWeb/src/app/features/major/major-add-form/major-add-form.ts
index 2daa689..2339556 100644
--- a/uniplanWeb/src/app/features/major/major-add-form/major-add-form.ts
+++ b/uniplanWeb/src/app/features/major/major-add-form/major-add-form.ts
@@ -31,13 +31,12 @@ import { FacultyService } from '../../faculty/faculty-service';
   styleUrl: './major-add-form.scss',
 })
 export class MajorAddForm implements OnInit {
-  //todo
-  majorName = '';
-  faculty = '';
-  type = '';
-  subtype = '';
+  protected majorName: string = '';
+  protected faculty: string = '';
+  protected type: string = '';
+  protected subtype: string = '';
 
-  faculties: FacultyElm[] = [];
+  protected faculties: FacultyElm[] = [];
 
   constructor(
     private dialogRef: MatDialogRef<AddForm>,
@@ -45,16 +44,16 @@ export class MajorAddForm implements OnInit {
     private facultyService: FacultyService
   ) {}
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.facultyService.getFaculties().subscribe({
-      next: (data) => {
+      next: (data: FacultyElm[]) => {
         this.faculties = data;
       },
-      error: (err) => console.error('Failed to load faculties', err),
+      error: (err: any): void => console.error('Failed to load faculties', err),
     });
   }
 
-  save() {
+  protected save(): void {
     if (
       !this.majorName.trim() ||
       !this.faculty ||
@@ -73,10 +72,10 @@ export class MajorAddForm implements OnInit {
         subtype: this.subtype,
       })
       .subscribe({
-        next: () => {
+        next: (): void => {
           this.dialogRef.close(true);
         },
-        error: () => alert('Failed to create major or course.'),
+        error: (): void => alert('Failed to create major or course.'),
       });
   }
 }
diff --git a/uniplanWeb/src/app/features/major/major-delete-form/major-delete-form.ts b/uniplanWeb/src/app/features/major/major-delete-form/major-delete-form.ts
index d75cd12..800027b 100644
--- a/uniplanWeb/src/app/features/major/major-delete-form/major-delete-form.ts
+++ b/uniplanWeb/src/app/features/major/major-delete-form/major-delete-form.ts
@@ -6,7 +6,7 @@ import {
   MatDialogRef,
 } from '@angular/material/dialog';
 import { MajorService } from '../major-service';
-import { switchMap } from 'rxjs';
+import {Observable, switchMap} from 'rxjs';
 
 @Component({
   selector: 'app-major-delete-form',
@@ -23,15 +23,15 @@ export class MajorDeleteForm {
     public data: { id: string; courseId: string; name: string }
   ) {}
 
-  deleteMajor(): void {
+  protected deleteMajor(): void {
     this.majorService
       .deleteCourse(this.data.courseId)
-      .pipe(switchMap(() => this.majorService.deleteMajor(this.data.id)))
+      .pipe(switchMap((): Observable<any> => this.majorService.deleteMajor(this.data.id)))
       .subscribe({
-        next: () => {
+        next: (): void => {
           this.dialogRef.close(true);
         },
-        error: () => {
+        error: (): void => {
           alert('Възникна грешка при изтриването на специалността или курса.');
         },
       });
diff --git a/uniplanWeb/src/app/features/major/major-edit-form/major-edit-form.ts b/uniplanWeb/src/app/features/major/major-edit-form/major-edit-form.ts
index 1c4b806..65dbe26 100644
--- a/uniplanWeb/src/app/features/major/major-edit-form/major-edit-form.ts
+++ b/uniplanWeb/src/app/features/major/major-edit-form/major-edit-form.ts
@@ -32,11 +32,10 @@ import { FacultyElm } from '../../../core/interfaces/faculty-elm';
   styleUrl: './major-edit-form.scss',
 })
 export class MajorEditForm implements OnInit {
-  //todo
-  majorName = '';
-  facultyId = '';
+  protected majorName: string = '';
+  protected facultyId: string = '';
 
-  faculties: FacultyElm[] = [];
+  protected faculties: FacultyElm[] = [];
 
   constructor(
     private dialogRef: MatDialogRef<EditForm>,
@@ -53,14 +52,14 @@ export class MajorEditForm implements OnInit {
     this.facultyId = data.facultyId || '';
   }
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.facultyService.getFaculties().subscribe({
-      next: (data) => (this.faculties = data),
-      error: (err) => console.error('Failed to load faculties', err),
+      next: (data: FacultyElm[]): FacultyElm[] => (this.faculties = data),
+      error: (err: any): void => console.error('Failed to load faculties', err),
     });
   }
 
-  save() {
+  protected save(): void {
     if (!this.majorName.trim()) {
       alert('Please enter the major name.');
       return;
@@ -72,8 +71,8 @@ export class MajorEditForm implements OnInit {
         facultyId: this.facultyId,
       })
       .subscribe({
-        next: () => this.dialogRef.close(true),
-        error: () => alert('Failed to update major.'),
+        next: (): void => this.dialogRef.close(true),
+        error: (): void => alert('Failed to update major.'),
       });
   }
 }
diff --git a/uniplanWeb/src/app/features/major/major-filters/major-filters.ts b/uniplanWeb/src/app/features/major/major-filters/major-filters.ts
index 6af86ae..3b54a45 100644
--- a/uniplanWeb/src/app/features/major/major-filters/major-filters.ts
+++ b/uniplanWeb/src/app/features/major/major-filters/major-filters.ts
@@ -21,20 +21,19 @@ import { FacultyService } from '../../faculty/faculty-service';
   styleUrl: './major-filters.scss',
 })
 export class MajorFilters {
-  //todo
-  @Input() internalSearchText = '';
+  @Input() public internalSearchText = '';
 
-  @Input() faculties: { id: string; name: string }[] = [];
+  @Input() public faculties: { id: string; name: string }[] = [];
 
-  @Input() types: string[] = [];
-  @Input() subtypes: string[] = [];
+  @Input() public types: string[] = [];
+  @Input() public subtypes: string[] = [];
 
-  @Input() selectedFaculty = '';
-  @Input() selectedType = '';
-  @Input() selectedSubtype = '';
+  @Input() public selectedFaculty: string = '';
+  @Input() public selectedType: string = '';
+  @Input() public selectedSubtype: string = '';
 
-  @Output() facultyChange = new EventEmitter<string>();
-  @Output() typeChange = new EventEmitter<string>();
-  @Output() subtypeChange = new EventEmitter<string>();
-  @Output() searchTextChange = new EventEmitter<string>();
+  @Output() public readonly facultyChange: EventEmitter<string> = new EventEmitter<string>();
+  @Output() public readonly typeChange: EventEmitter<string> = new EventEmitter<string>();
+  @Output() public readonly subtypeChange: EventEmitter<string> = new EventEmitter<string>();
+  @Output() public readonly searchTextChange: EventEmitter<string> = new EventEmitter<string>();
 }
diff --git a/uniplanWeb/src/app/features/major/major-options/major-options.ts b/uniplanWeb/src/app/features/major/major-options/major-options.ts
index e5a0660..e55b232 100644
--- a/uniplanWeb/src/app/features/major/major-options/major-options.ts
+++ b/uniplanWeb/src/app/features/major/major-options/major-options.ts
@@ -22,7 +22,7 @@ import { AddButton } from '../../../core/shared/add-button/add-button';
 export class MajorOptions {
   constructor(private dialog: MatDialog) {}
 
-  openAddForm() {
+  protected openAddForm(): void {
     this.dialog.open(MajorAddForm, {
       width: '400px',
     });
diff --git a/uniplanWeb/src/app/features/major/major-service.ts b/uniplanWeb/src/app/features/major/major-service.ts
index e89004f..819e73f 100644
--- a/uniplanWeb/src/app/features/major/major-service.ts
+++ b/uniplanWeb/src/app/features/major/major-service.ts
@@ -7,18 +7,18 @@ import { MajorElm } from '../../core/interfaces/major-elm';
   providedIn: 'root',
 })
 export class MajorService {
-  private apiUrl = 'http://localhost:8080/api/majors';
-  private apiUrlMajor = 'http://localhost:8080/api/majors';
-  private apiUrlCourse = 'http://localhost:8080/api/courses';
+  private apiUrl: string = 'http://localhost:8080/api/majors';
+  private apiUrlMajor: string = 'http://localhost:8080/api/majors';
+  private apiUrlCourse: string = 'http://localhost:8080/api/courses';
 
-  refreshNeeded = new Subject<void>();
+  public readonly refreshNeeded: Subject<void> = new Subject<void>();
 
   constructor(private http: HttpClient) {}
 
-  getMajors(): Observable<MajorElm[]> {
+  public getMajors(): Observable<MajorElm[]> {
     return this.http.get<MajorElm[]>(this.apiUrl).pipe(
-      map((majors) =>
-        majors.map((major, index) => ({
+      map((majors: MajorElm[]): any =>
+        majors.map((major: MajorElm, index: number) => ({
           majorId: major.majorId,
           majorName: major.majorName,
           courseId: major.courseId,
@@ -31,32 +31,32 @@ export class MajorService {
     );
   }
 
-  createMajor(createMajor: {
+  public createMajor(createMajor: {
     facultyId: string;
     majorName: string;
   }): Observable<any> {
     return this.http.post(`${this.apiUrlMajor}`, createMajor).pipe(
-      map((res) => {
+      map((res: Object): Object => {
         this.refreshNeeded.next();
         return res;
       })
     );
   }
 
-  createCourse(course: {
+ public createCourse(course: {
     majorId: string;
     courseYear: number;
     courseType: string;
     courseSubtype: string;
   }): Observable<any> {
     return this.http.post(`${this.apiUrlCourse}`, course).pipe(
-      map((res) => {
+      map((res: Object): Object => {
         this.refreshNeeded.next();
         return res;
       })
     );
   }
-  createMajorWithCourse(majorData: {
+  public createMajorWithCourse(majorData: {
     facultyId: string;
     majorName: string;
     type: string;
@@ -66,7 +66,7 @@ export class MajorService {
       facultyId: majorData.facultyId,
       majorName: majorData.majorName,
     }).pipe(
-      switchMap((createdMajor: any) => {
+      switchMap((createdMajor: any): Observable<any> => {
         return this.createCourse({
           majorId: createdMajor.id,
           courseType: majorData.type,
@@ -77,31 +77,31 @@ export class MajorService {
     );
   }
 
-  deleteMajor(id: string): Observable<any> {
+  public deleteMajor(id: string): Observable<any> {
     return this.http.delete(`${this.apiUrlMajor}/${id}`).pipe(
-      map((res) => {
+      map((res: Object): Object => {
         this.refreshNeeded.next();
         return res;
       })
     );
   }
 
-  deleteCourse(courseId: string): Observable<any> {
+  public deleteCourse(courseId: string): Observable<any> {
     return this.http.delete(`${this.apiUrlCourse}/${courseId}`);
   }
 
   deleteMajorWithCourse(major: MajorElm): Observable<any> {
     return this.deleteCourse(major.courseId).pipe(
-      switchMap(() => this.deleteMajor(major.majorId))
+      switchMap((): Observable<any> => this.deleteMajor(major.majorId))
     );
   }
 
-  editMajor(
+  public editMajor(
     id: string,
     updateMajor: { facultyId: string; majorName: string }
   ): Observable<any> {
     return this.http.put(`${this.apiUrlMajor}/${id}`, updateMajor).pipe(
-      map((res) => {
+      map((res: Object): Object => {
         this.refreshNeeded.next();
         return res;
       })
diff --git a/uniplanWeb/src/app/features/student/student-add-form/student-add-form.ts b/uniplanWeb/src/app/features/student/student-add-form/student-add-form.ts
index 157d98e..4f3cf00 100644
--- a/uniplanWeb/src/app/features/student/student-add-form/student-add-form.ts
+++ b/uniplanWeb/src/app/features/student/student-add-form/student-add-form.ts
@@ -23,17 +23,16 @@ import { FormsModule } from '@angular/forms';
   styleUrl: './student-add-form.scss',
 })
 export class StudentAddForm {
-  //todo
-  studentName = '';
-  facultyNumber = '';
-  faculty = '';
-  major = '';
-  course = '';
-  type = '';
+  protected studentName: string = '';
+  protected facultyNumber: string = '';
+  protected faculty: string = '';
+  protected major: string = '';
+  protected course: string = '';
+  protected type: string = '';
 
   constructor(private dialogRef: MatDialogRef<AddForm>) {}
 
-  save() {
+  protected save(): void {
     if (!this.studentName.trim()) {
       alert('Please enter student name.');
       return;
diff --git a/uniplanWeb/src/app/features/student/student-filters/student-filters.ts b/uniplanWeb/src/app/features/student/student-filters/student-filters.ts
index 7db2f2b..58c88c3 100644
--- a/uniplanWeb/src/app/features/student/student-filters/student-filters.ts
+++ b/uniplanWeb/src/app/features/student/student-filters/student-filters.ts
@@ -10,17 +10,16 @@ import { FiltersForm } from '../../../core/shared/filters-form/filters-form';
   styleUrl: './student-filters.scss',
 })
 export class StudentFilters {
-  //todo
-  @Input() internalSearchText = '';
-  @Output() searchTextChange = new EventEmitter<string>();
+  @Input() public internalSearchText: string = '';
+  @Output() public readonly searchTextChange: EventEmitter<string> = new EventEmitter<string>();
 
-  @Input() internalSearchFacNum = '';
-  @Output() searchFacNumChange = new EventEmitter<string>();
+  @Input() public internalSearchFacNum: string = '';
+  @Output() public readonly searchFacNumChange: EventEmitter<string> = new EventEmitter<string>();
 
-  @Input() internalSearchMajor = '';
-  @Output() searchMajorChange = new EventEmitter<string>();
+  @Input() public internalSearchMajor: string = '';
+  @Output() public readonly searchMajorChange: EventEmitter<string> = new EventEmitter<string>();
 
-  @Input() subtypes: string[] = [];
-  @Input() selectedSubtype = '';
-  @Output() subtypeChange = new EventEmitter<string>();
+  @Input() public subtypes: string[] = [];
+  @Input() public selectedSubtype: string = '';
+  @Output() public readonly subtypeChange: EventEmitter<string> = new EventEmitter<string>();
 }
diff --git a/uniplanWeb/src/app/features/student/student-options/student-options.ts b/uniplanWeb/src/app/features/student/student-options/student-options.ts
index 04b7c24..5a60b48 100644
--- a/uniplanWeb/src/app/features/student/student-options/student-options.ts
+++ b/uniplanWeb/src/app/features/student/student-options/student-options.ts
@@ -13,7 +13,7 @@ import { StudentAddForm } from '../student-add-form/student-add-form';
 export class StudentOptions {
   constructor(private dialog: MatDialog) {}
 
-  openAddForm() {
+  protected openAddForm(): void {
     this.dialog.open(StudentAddForm, {
       width: '400px',
     });
diff --git a/uniplanWeb/src/app/features/student/student-table/student-table.ts b/uniplanWeb/src/app/features/student/student-table/student-table.ts
index acffefe..16679f2 100644
--- a/uniplanWeb/src/app/features/student/student-table/student-table.ts
+++ b/uniplanWeb/src/app/features/student/student-table/student-table.ts
@@ -113,13 +113,12 @@ export const ELEMENT_STUDENT_DATA: StudentElm[] = [
   styleUrl: './student-table.scss',
 })
 export class StudentTable implements OnInit, OnChanges {
-  //todo
-  @Input() searchText = '';
-  @Input() searchFacNum = '';
-  @Input() searchMajor = '';
-  @Input() subtype = '';
+  @Input() public searchText: string = '';
+  @Input() public searchFacNum: string = '';
+  @Input() public searchMajor: string = '';
+  @Input() public subtype: string = '';
 
-  @Input() subtypes: string[] = [];
+  @Input() public subtypes: string[] = [];
 
   displayedColumns: string[] = [
     'position',
@@ -132,44 +131,44 @@ export class StudentTable implements OnInit, OnChanges {
     'actions',
   ];
 
-  originalData: StudentElm[] = ELEMENT_STUDENT_DATA;
-  dataSourceFilter: StudentElm[] = ELEMENT_STUDENT_DATA;
+  protected originalData: StudentElm[] = ELEMENT_STUDENT_DATA;
+  protected dataSourceFilter: StudentElm[] = ELEMENT_STUDENT_DATA;
 
-  ngOnInit(): void {
+  public ngOnInit(): void {
     this.subtypes = StudentTable.getFilterOptions(this.originalData).subtypes;
     this.applyFilters();
   }
 
-  ngOnChanges(changes: SimpleChanges): void {
+  public ngOnChanges(changes: SimpleChanges): void {
     this.applyFilters();
   }
 
-  applyFilters(): void {
-    const name = this.searchText.toLowerCase();
-    const major = this.searchMajor.toLowerCase();
-    const facNum = this.searchFacNum;
+  private applyFilters(): void {
+    const name: string = this.searchText.toLowerCase();
+    const major: string = this.searchMajor.toLowerCase();
+    const facNum: string = this.searchFacNum;
 
     this.dataSourceFilter = this.originalData.filter((student) => {
-      const matchName = !name || student.name.toLowerCase().includes(name);
-      const matchMajor = !major || student.major.toLowerCase().includes(major);
-      const matchFacNum = !facNum || student.facultyNumber.includes(facNum);
-      const matchSubtype = !this.subtype || student.subtype === this.subtype;
+      const matchName: boolean = !name || student.name.toLowerCase().includes(name);
+      const matchMajor: boolean = !major || student.major.toLowerCase().includes(major);
+      const matchFacNum: boolean = !facNum || student.facultyNumber.includes(facNum);
+      const matchSubtype: boolean = !this.subtype || student.subtype === this.subtype;
 
       return matchName && matchMajor && matchFacNum && matchSubtype;
     });
   }
 
-  static getFilterOptions(data: StudentElm[]) {
+  public static getFilterOptions(data: StudentElm[]) {
     return {
-      subtypes: [...new Set(data.map((e) => e.subtype))],
+      subtypes: [...new Set(data.map((e: StudentElm) => e.subtype))],
     };
   }
 
-  onEdit(element: StudentElm): void {
+  protected onEdit(element: StudentElm): void {
     console.log('Editing:', element);
   }
 
-  onDelete(element: StudentElm): void {
+  protected onDelete(element: StudentElm): void {
     console.log('Deleting:', element);
   }
 }
diff --git a/uniplanWeb/src/app/features/university/university-service.ts b/uniplanWeb/src/app/features/university/university-service.ts
index 7516f0a..b611efd 100644
--- a/uniplanWeb/src/app/features/university/university-service.ts
+++ b/uniplanWeb/src/app/features/university/university-service.ts
@@ -15,11 +15,11 @@ export interface UniversityElm {
   providedIn: 'root',
 })
 export class UniversityService {
-private apiUrl = 'http://localhost:8080/api/universities';
+private apiUrl: string = 'http://localhost:8080/api/universities';
 
   constructor(private http: HttpClient) {}
 
-  getAllUniversities(): Observable<UniversityElm[]> {
+  public getAllUniversities(): Observable<UniversityElm[]> {
     return this.http.get<UniversityElm[]>(this.apiUrl);
   }
 }
diff --git a/uniplanWeb/src/app/services/login-auth-service.ts b/uniplanWeb/src/app/services/login-auth-service.ts
index 3ec49fe..8d68305 100644
--- a/uniplanWeb/src/app/services/login-auth-service.ts
+++ b/uniplanWeb/src/app/services/login-auth-service.ts
@@ -4,17 +4,17 @@ import { Injectable } from '@angular/core';
   providedIn: 'root'
 })
 export class LoginAuthService {
-  private loggedIn = false;
+  private loggedIn: boolean = false;
 
   constructor() {
     this.loggedIn = !!localStorage.getItem('user');
   }
 
-  isLoggedIn(): boolean {
+  public isLoggedIn(): boolean {
     return this.loggedIn;
   }
 
-  logout(): void {
+  public logout(): void {
     localStorage.removeItem('user');
     this.loggedIn = false;
   }