@Entity
@Table(name="Departments")
public class Department implements Serializable
{
	private Long id;
	private String name;

	@OneToMany(mappedBy="department")
	private Set<Employee> employeeSet;

	public Department()
	{
		employeeSet = new HashSet<Employee>();
	}

	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	@Column(name="DEP_ID")
	public Long getId()
	{
		return id;
	}

	public void setId( Long id )
	{
		this.id = id;
	}

	@Column(name="DEP_NAME")
	public String getName()
	{
		return name;
	}

	public void setName( String name )
	{
		this.name = name;
	}

	@Override
	public String toString()
	{
		return "Department [id=" + id + ", name=" + name + "]";
	}
}

@Stateless
public class SessionBean implements RemoteBean
{
	@PersistenceContext( unitName = "EJB_Test1" )
	private EntityManager entityManager;

	@Override
	public void createDepartment( Department department )
	{
		entityManager.persist( department );
	}

	@Override
	public void deleteDepartment( Department department )
	{
		Department tempDepartment = entityManager.find( Department.class, department );
		entityManager.remove( department );
	}

	@Override
	public void updateDepartment( Department department )
	{
		entityManager.merge( department );
	}

	@Override
	public Department getDepartment( Long id )
	{
		Department department = entityManager.find( Department.class, id );

		return department;
	}

	@Override
	public Department getDepartment( String name )
	{
		Department department = entityManager.find( Department.class, name );

		return department;
	}
}

<persistence-unit name="EJB_Test1" transaction-type="JTA">
	<provider>org.hibernate.ejb.HibernatePersistence</provider>
	<jta-data-source>java:/Test</jta-data-source>
	<properties>
		<property name="hibernate.hbm2ddl.auto" value="update"/>
		<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
	</properties>
</persistence-unit>

	<enterprise-beans>
		<session>
			<ejb-name>SessionEJB</ejb-name>
			<ejb-class>com.ejb_test1.sessions.SessionBean</ejb-class>
			<session-type>Stateless</session-type>
			<transaction-type>Container</transaction-type>
		</session>
	</enterprise-beans>

<property name="hibernate.hbm2ddl.auto" value="create-drop"/>

public class Main
{
	public static void main( String... arg )
	{
		try
		{
			Employee emp = new Employee();
			emp.setF( "Ivanov" );
			emp.setI( "Ivan" );
			emp.setO( "Ivanovich" );

			InitialContext ctx = getContext();
			RemoteBean remote = ( RemoteBean ) ctx.lookup( "RemoteBean/remote" );
			remote.createEmployee( emp );
		}
		catch ( NamingException e )
		{
			e.printStackTrace();
		}
	}

	private static InitialContext getContext() throws NamingException
	{
		final Properties prop = new Properties();
		prop.put( Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory" );
		prop.put( Context.PROVIDER_URL, "jnp://127.0.0.1:1099" );
		return new InitialContext( prop );
	}
}