java.lang.ClassCastException: org.eclipse.jpt.jpa.core.internal.jpa1.context.persistence.GenericClassRef cannot be cast to org.jboss.tools.hibernate.jpt.core.internal.context.persistence.HibernateClassRef
	at org.jboss.tools.hibernate.jpt.core.internal.context.HibernatePersistenceUnit$2.transform(HibernatePersistenceUnit.java:1)
	at org.eclipse.jpt.common.utility.internal.iterator.TransformationIterator.next(TransformationIterator.java:54)
	at org.eclipse.jpt.common.utility.internal.iterator.FilteringIterator.loadNext(FilteringIterator.java:122)
	at org.eclipse.jpt.common.utility.internal.iterator.FilteringIterator.<init>(FilteringIterator.java:90)
	at org.eclipse.jpt.common.utility.internal.iterable.FilteringIterable.iterator(FilteringIterable.java:68)
	at org.eclipse.jpt.common.utility.internal.iterable.TransformationIterable.iterator(TransformationIterable.java:50)
	at org.eclipse.jpt.common.utility.internal.iterable.CompositeIterable.iterables(CompositeIterable.java:72)
	at org.eclipse.jpt.common.utility.internal.iterable.CompositeIterable.iterators(CompositeIterable.java:65)
	at org.eclipse.jpt.common.utility.internal.iterable.CompositeIterable.iterator(CompositeIterable.java:57)
	at org.eclipse.jpt.common.utility.internal.iterable.IterableTools$IteratorTransformer.transform(IterableTools.java:914)
	at org.eclipse.jpt.common.utility.internal.iterable.IterableTools$IteratorTransformer.transform(IterableTools.java:1)
	at org.eclipse.jpt.common.utility.internal.iterator.TransformationIterator.next(TransformationIterator.java:54)
	at org.eclipse.jpt.common.utility.internal.iterator.CompositeIterator.loadCurrentIterator(CompositeIterator.java:88)
	at org.eclipse.jpt.common.utility.internal.iterator.CompositeIterator.hasNext(CompositeIterator.java:51)
	at org.eclipse.jpt.jpa.core.internal.context.persistence.AbstractPersistenceUnit.mapByName(AbstractPersistenceUnit.java:2112)
	at org.eclipse.jpt.jpa.core.internal.context.persistence.AbstractPersistenceUnit.buildGenerators(AbstractPersistenceUnit.java:1527)
	at org.eclipse.jpt.jpa.core.internal.context.persistence.AbstractPersistenceUnit.update(AbstractPersistenceUnit.java:294)
	at org.jboss.tools.hibernate.jpt.core.internal.context.HibernatePersistenceUnit.update(HibernatePersistenceUnit.java:92)
	at org.eclipse.jpt.jpa.core.internal.context.AbstractJpaContextNode.updateNodes(AbstractJpaContextNode.java:61)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.persistence.GenericPersistence.update(GenericPersistence.java:71)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.persistence.GenericPersistenceXml.syncPersistence(GenericPersistenceXml.java:140)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.persistence.GenericPersistenceXml.updatePersistence(GenericPersistenceXml.java:97)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.persistence.GenericPersistenceXml.update(GenericPersistenceXml.java:93)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.GenericRootContextNode.syncPersistenceXml(GenericRootContextNode.java:126)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.GenericRootContextNode.updatePersistenceXml(GenericRootContextNode.java:160)
	at org.eclipse.jpt.jpa.core.internal.jpa1.context.GenericRootContextNode.update(GenericRootContextNode.java:76)
	at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.update(AbstractJpaProject.java:2011)
	at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject$UpdateJobCommand.execute(AbstractJpaProject.java:1998)
	at org.eclipse.jpt.common.core.internal.utility.command.RepeatingJobCommandWrapper.executeCommand(RepeatingJobCommandWrapper.java:207)
	at org.eclipse.jpt.common.core.internal.utility.command.NotifyingRepeatingJobCommandWrapper.executeCommand(NotifyingRepeatingJobCommandWrapper.java:68)
	at org.eclipse.jpt.common.core.internal.utility.command.RepeatingJobCommandWrapper.execute_(RepeatingJobCommandWrapper.java:192)
	at org.eclipse.jpt.common.core.internal.utility.command.RepeatingJobCommandWrapper$StartJobCommand.execute(RepeatingJobCommandWrapper.java:172)
	at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager.execute_(InternalJpaProjectManager.java:1202)
	at org.eclipse.jpt.jpa.core.internal.InternalJpaProjectManager$ClientJobCommandWrapper.execute(InternalJpaProjectManager.java:1182)
	at org.eclipse.jpt.common.core.internal.utility.command.JobCommandJob.run(JobCommandJob.java:42)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)