The following cleanups where applied:

• Add final modifier to private fields
• Add missing '@Deprecated' annotations
• Add missing '@Override' annotations
• Add missing '@Override' annotations to implementations of interface methods
• Convert control statement bodies to block
• Make inner classes static where possible
• Remove trailing white spaces on all lines
• Remove unnecessary array creation for varargs
• Remove unnecessary suppress warning tokens
• Remove unused imports
• Replace deprecated calls with inlined content where possible
• Use pattern matching for instanceof