Map<String, String> properties = new HashMap<String, String>();
        properties.put(AvailableSettings.CFG_FILE, "myHibernate.cfg.xml");
      Persistence.createEntityManagerFactory("myPersistenceUnit, properties);

Caused by: java.lang.UnsupportedOperationException
	at java.util.Collections$UnmodifiableMap.remove(Collections.java:1345)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.mergePropertySources(EntityManagerFactoryBuilderImpl.java:555)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:212)
	at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:51)
	at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:129)
	at org.hibernate.ejb.HibernatePersistence.getEntityManagerFactoryBuilderOrNull(HibernatePersistence.java:94)
	at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:86)
	at org.hibernate.ejb.HibernatePersistence.getEntityManagerFactoryBuilderOrNull(HibernatePersistence.java:102)
	at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:67)
	... 57 more