In org.jbpm.services.cdi.implDeploymentServiceCDIImpl

@Inject
@PersistenceUnit(unitName = "org.jbpm.domain")
@Override
public void setEmf(EntityManagerFactory emf) {
	super.setEmf(emf);
}

essentially forces a requirement that the persistence unit has the name org.jbpm.domain. The Developer should be able to name the persistance unit as they wish.

Ideally the Deployment impl would have a EMF injected using a qualifier ( @Jbpm ). It could then be set up a with a producer by the implementer.