I just reimplemented the EclipsePlugin.
It inherits from FamixEntity.
I also implemented a FAMIXEclipseReference that inherits from
FAMIXReference.
FAMIXEclipseReference is for dependence between eclipse plugins?
If so, may be a better name could be found?
e.g. FamixEclipsePluginImport, FamixEclipsePluginDependence