FinalClass (if a class only has private constructors, it should be declared as final so that the intention for it to not be overridden is clear) has 11 violations, plan to add final declaration
HideUtilityClassConstructor (if a class has only static methods/fields, it's utility and doesn't need to be instantiated) has 51 violations, plan to add private constructors / declare existing constructors private and see whether this breaks something in our code (i.e. whether we have instances of any utility classes).
Minor