@Test(expected = OptimisticLockException.class)
	public void testManagedEntity() throws Exception {
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Company company = new Company();
		company.setName("a");
		s.save(company);
		tx.commit();
		tx = s.beginTransaction();
		company.setName("b");
		company.setVersion(company.getVersion() - 1); //expecting exception
		tx.commit();
		s.close();
	}