plugin.xml

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

<!--
-->

<plugin>

   <extension point="org.eclipse.emf.ecore.generated_package">
      <!-- @generated Quantities -->
      <package
            uri="https://www.hft-stuttgart.de/quantities"
            class="de.hftstuttgart.cityunits.quantities.QuantitiesPackage"
            genModel="model/Quantities.genmodel"/>
   </extension>

</plugin>