plugins/modelbase/org.eclipse.datatools.modelbase.dbdefinition/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?> 
<plugin>

     <extension
         point="org.eclipse.emf.ecore.generated_package">
      <package
            uri="http:///org/eclipse/datatools/modelbase/dbdefinition/dbdefinition.ecore"
            class="org.eclipse.datatools.modelbase.dbdefinition.DatabaseDefinitionPackage">
      </package>
   </extension>

</plugin>