Prevent each build from overriding modification of generated Finders or Matchers

[JasperEssien2]

I might want to modify the generate Finder or Matcher class to suit my need. But running the command to generate new files based on annotations, delete the previous file and regenerates a new file.

Just thinking about it, this occurs due to a change in the code that triggers generation.

Still putting this here to take a look later.