title: Visually organizing classes in package
body: <p>I have a package with a lot of classes, and I want to organize them. I would happily split them into several packages based on my "category" of class, but unfortunately most of them are parts of a united system with package-level visibility.</p>
  
  <p>Is there any way to create some sort of "subfolders" inside a package in Eclipse just to visually divide files in groups?</p>