plugins/design/org.eclipse.papyrus.pdp4eng.designer.datastrategies/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
<extension
         point="org.eclipse.ui.startup">
      <startup
            class="org.eclipse.papyrus.pdp4eng.designer.datastrategies.Activator"></startup>
   </extension>

</plugin>