private List<Resource> addEventPort(final SoftPkg spd) throws CoreException {
    final Descriptor desc = spd.getDescriptor();
    if (desc != null) {
      final SoftwareComponent scd = desc.getComponent();
      ComponentFeatures features = scd.getComponentFeatures();
      if (features == null) {
        features = ScdFactory.eINSTANCE.createComponentFeatures();
        scd.setComponentFeatures(features);
      }
      Ports ports = features.getPorts();
      if (ports == null) {
        ports = ScdFactory.eINSTANCE.createPorts();
        features.setPorts(ports);
      }

      Interfaces interfaces = scd.getInterfaces();
      boolean found = false;
      if (interfaces != null) {
        for (final Interface i : interfaces.getInterface()) {
          if (EventChannelHelper.id().equals(i.getRepid())) {
            found = true;
            break;
          }
        }
      } else {
        interfaces = ScdFactory.eINSTANCE.createInterfaces();
        scd.setInterfaces(interfaces);
      }

      if (!found) {
        final Interface i = ScdFactory.eINSTANCE.createInterface();
        i.setName("EventChannel");
        i.setRepid(EventChannelHelper.id());
        interfaces.getInterface().add(i);
      }

      final Uses uses = ScdFactory.eINSTANCE.createUses();
      ports.getUses().add(uses);
      uses.setName(Uses.PORT_NAME_PROP_EVENTS);
      uses.setRepID(EventChannelHelper.id());
      final PortTypeContainer ptc = ScdFactory.eINSTANCE.createPortTypeContainer();
      ptc.setType(PortType.RESPONSES);
      uses.getPortType().add(ptc);

      return Collections.singletonList(scd.eResource());
    } else {
      throw new CoreException(
          new Status(
              IStatus.ERROR,
              ComponentUiPlugin.PLUGIN_ID,
              "No descriptor, quick fix failed for " + spd.eResource().getURI().path(),
              null));
    }
  }
 @Override
 protected String getRepId() {
   return EventChannelHelper.id();
 }