Is there a tool, option or script to insert a custom template into the header of every existing source file within an Eclipse project?`
Some background information
I have very recently open-sourced a small application written for a university assignment. Initially the source files did not require any explicit license or author information. But now I am releasing the code I would like to place this information in the header of each Java source file.
I know Eclipse has the capability of inserting a custom template in each new file, and I will be doing this from now on. But there is around 60 existing .java files within which I wish to place this header. While that is not a huge number, I really don't fancy repeating the same cut and paste operation 60 times if there's a lazier way to do it.
P.S. I couldn't think up any better tags for this question, suggestions welcome.