Prevent creating variants of Util classes like "DBUtils" or "DBUtility"

Author: AB-xdev

.config/checkstyle/checkstyle.xml

@@ -81,7 +81,7 @@
 		</module>
 		<!-- Name classes correctly and don't use generic name for everything -->
 		<module name="IllegalIdentifierName">
-			<property name="format" value="^(?!(.*(Helper|Util))$).+$"/>
+			<property name="format" value="^(?!(.*(Helper|Util(s|ity)?))$).+$"/>
 			<property name="tokens" value=" CLASS_DEF"/>
 		</module>
 		<module name="IllegalImport"/>