public class ReferenceTest {
	
	
private static CDOSession cdoSession;
    
	public static void init() {
		// The following lines are not needed if the extension
		// registry (OSGi/Equinox) is running
		
		Net4jUtil.prepareContainer(IPluginContainer.INSTANCE);
		TCPUtil.prepareContainer(IPluginContainer.INSTANCE);
		
		cdoSession = openSession("repo1");
		
	}
	
	public static CDOSession openSession(String repoName) {
		
	
		final IConnector connector = (IConnector) IPluginContainer.INSTANCE
				.getElement( //
						"org.eclipse.net4j.connectors", // Product group
						"tcp", // Type
						"localhost"); // Description
		CDOSessionConfiguration config = CDONet4jUtil
				.createSessionConfiguration();
		
		((CDONet4jSessionConfiguration) config).setConnector(connector);
		((CDONet4jSessionConfiguration) config).setRepositoryName(repoName);
		CDOSession session = config.openSession();
		
		
		session.addListener(new LifecycleEventAdapter() {
			@Override
			protected void onDeactivated(ILifecycle lifecycle) {
				connector.close();
			}
		});
		return session;
	}
	
    
    /**
     * Saves the List of EObjects to the specified URI. The URI must not be null.
     * 
     * @param uri
     * @param objects
     * @throws IOException
     */
    //public static void save(List<EObject> objects) throws IOException {
      	
	public static void save(EObject object) throws IOException {
    	try
    	{
    	      init();
		
		CDOTransaction transaction = cdoSession.openTransaction();
		
		CDOResource resource = transaction
				.getOrCreateResource("/res1");
		
	       resource.getContents().add(object);
		
		transaction.commit();
		cdoSession.close();
        } catch (CommitException e) {
		    e.printStackTrace();
	    } finally {
	    	if(cdoSession!=null){
		        cdoSession.close();
	    	}
	    }
    }
    
	public static void main(String [] args)
	{

	   java.lang.System.out.println("Starting");
	   
          //Designator extends an object that extends CDOObject
	   Designator d = ReferenceFactory.eINSTANCE.createDesignator();
	   
	   String valid = "Y";
	   d.getValid().add(valid);

          //Reference extends an object that extends CDOObject
	   Reference r = ReferenceFactory.eINSTANCE.createReference();
	   r.getDesignator().add(d);
	
	   try
	   {
	       save(d);
	   }
	   catch(Exception e)
	   {
		   e.printStackTrace();
	   }
	   System.out.println("End");
	   
	}
	
}

<eClassifiers xsi:type="ecore:EEnum" name="ValueType" serializable="false">
    <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
      <details key="documentation" value="Enumeration to specify the types of Values that can be attached to a property."/>
    </eAnnotations>
    <eLiterals name="VALUE" value="2">
      <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
        <details key="documentation" value="The current property holds a value"/>
      </eAnnotations>
    </eLiterals>
    <eLiterals name="NA">
      <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
        <details key="documentation" value="Means the current property is Not Applicable to the containing instance"/>
      </eAnnotations>
    </eLiterals>
    <eLiterals name="UNKNOWN" value="1">
      <eAnnotations source="http://www.eclipse.org/emf/2002/GenModel">
        <details key="documentation" value="The current Property is unknown for the containing instance"/>
      </eAnnotations>
    </eLiterals>
  </eClassifiers>