There is an exception in hibernate jpa 2.0 project:
java.lang.ClassCastException: org.jboss.tools.hibernate.jpt.core.internal.jpa2.HibernateJpaFactory2_0 cannot be cast to org.eclipse.jpt.jpa.core.jpa2.JpaFactory2_0
at org.eclipse.jpt.jpa.core.internal.AbstractJpaNode.getJpaFactory2_0(AbstractJpaNode.java:131)
at org.eclipse.jpt.jpa.core.internal.jpa1.GenericJpaDataSource.buildDatabaseIdentifierAdapter(GenericJpaDataSource.java:141)
at org.eclipse.jpt.jpa.core.internal.jpa1.GenericJpaDataSource.buildConnectionProfile(GenericJpaDataSource.java:136)
at org.eclipse.jpt.jpa.core.internal.jpa1.GenericJpaDataSource.<init>(GenericJpaDataSource.java:64)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaFactory.buildJpaDataSource(AbstractJpaFactory.java:179)
at org.eclipse.jpt.jpa.core.internal.AbstractJpaProject.<init>(AbstractJpaProject.java:239)