Could we begin using Project Lombok to help new contributors more?

Project Lombok was mentioned by my Java friends as another thing that might help OpenRefine with some good best practices and also helps new contributors as a bonus.

It could be worth adopting, sure. But I would ideally want to do that after the first stable 4.0 release, because otherwise this is going to generate quite a lot of code changes everywhere which will make it harder to merge changes from 3.x into 4.x.