refactor: private constructors for util classes and changing places of modifiers

[bharathkalyans]

This PR handles the warnings of creating a private constructor for util classes and changing final private to private final to maintain code consistency.

• Fixes issue refactor: Refactoring of the code base #5

[bharathkalyans]

adding throw new UnsupportedOperationException("This is a utility class and cannot be instantiated"); in these utility classes can make it more readable.
@artpar your opinion?

[artpar]

@bharathkalyans Thanks for the PR.

Changes which rearrange the keywords and reformat the code are something which I don't want to accept at this point.

This leaves the 3 changes,

• Contants.java private constructor
• fixing of the comment in Unlogged.java
• ClassTypeUtil.java private constructor

They look fine and I can merge them if you can remove the formatting changes.

[bharathkalyans]

Sure, will create a new PR for this issue solving only the mentioned changes.