Usually a team defines an encoding that is used for all files of a project. Sometimes there is more than one encoding, if either the project demands some specific encoding (e.g. in XML files) or a specification demands it (in the case of Java properties files).
Since the current version of Maven lacks convenient support for some encoding problems, a tool that ensures that specific files are copied with the right encoding is quite handy.
Our Recode Maven Plugin is developed for this simple task.