plugins/org.eclipse.epsilon.eunit.dt.diff.files/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.epsilon.eunit.dt.diffviewer">
      <diffviewer
            class="org.eclipse.epsilon.eunit.dt.diff.files.FilesystemTreeDifferenceViewer">
      </diffviewer>
   </extension>

</plugin>