Reformat

[MrCrazys]

• Replaced UtilityClass annotation with NoArgsConstructor annotation and added static to all methods. This is just for consistency with the other classes, and also to make it clear.
• Changed JavaDoc.

[kangarko]

Thanks, this was suggested before already, I prefer the static there because the annotation and the lack of static can be confusing for beginner students reading the class. I prefer simplicity