Ryan Ernst 95499c45a5 Change file changes listener for resource watcher to an interface
Currently to use the ResourceWatcherService to watch files, you
implement a FileChangesListener. However, this is a class, not an
interface, even though it has no base state or anything like that, just
defining a few methods. This change converts FileChangesListener to an
interface.
2016-07-27 15:25:24 -07:00
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