* @return The {@code EntityManagerFactory}
*/
@Override
public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo unitInfo, Map properties) {
try {
EntityManagerFactoryImpl emf = new ForceEntityManagerFactory(unitInfo, getOverrideMap(properties));
return emf;
} catch (NotProviderException npe) {
return null;
} catch (NoPersistenceUnitException npue) {
return null;