+1  A: 

I hope it's not to late for my answer.

As far as I know, there is no such plugin (I looked at eclipse plugin central right now).

If you want to write such plugin, it shouldn't be too hard to write the refactoring (the Java Editor is based on an AST, that can be reached via extension points) itself, but for building a working plugin it might need more study.

Some resources that might help:

  • Plugin development resources from stackoverflow: question 592391 (sorry, but cannot post two hyperlinks)
  • An open source refactoring plugin: http://code.google.com/p/tane/ (it currently contains a single refactoring plus the related gui elements, it might be a good example for you)
Zoltán Ujhelyi