Alquém já viu esse erro em JPA?

Assuntos Gerais Agile
#1 
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/hibernate/proxy/EntityNotFoundDelegate
	at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:119)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
	at modelo.DAO.PessoaFisicaDAO.novoCadastro(PessoaFisicaDAO.java:20)
	at controle.ControlePessoaFisica.actionPerformed(ControlePessoaFisica.java:82)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

Coloquei as classes no classpath:
ejb3-persistence
hibernate-annotations
hibernate-commons-annotations
hibernate-entitymanager
hibernate-validator

coloquei o persistence.xml dentro da pasta META-INF

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
	
	<persistence-unit name="banco">
       <provider>org.hibernate.ejb.HibernatePersistence</provider>
       <class>modelo.PessoaFisica</class>
       <class>modelo.PessoaJuridica</class>
       <class>modelo.Endereco</class>
       <class>modelo.Contrato</class>
       
    <properties>
        <property name="hibernate.hbm2ddl.auto" value="update"/>
        <property name="hibernate.connection.url" value="com.mysql.jdbc.Driver"/>
        <property name="hibernate.connection.username" value="root"/>
        <property name="hibernate.connection.password" value=""/>
        <property name="hibernate.connection.driver_class" value="jdbc:mysql://localhost/contratos"/>
     </properties>
 

	</persistence-unit>
</persistence>

e minha classe de persistencia é a seguinte

public class PessoaFisicaDAO
{
	
	private EntityManagerFactory factory;
	
	private EntityManager manager;
	
	public boolean novoCadastro(PessoaFisica pessoaFisica)
	{
		
		factory = Persistence.createEntityManagerFactory("banco");
		manager = factory.createEntityManager();
		
		EntityTransaction tx = manager.getTransaction();
		tx.begin();
		try 
		{
			manager.persist(pessoaFisica);
			manager.flush();
			manager.clear();
			tx.commit();
		
		}
		catch (RuntimeException e) 
		{ 
			tx.rollback();
			manager.close();
			factory.close();
			return false;
		}
		manager.close();
		factory.close();
		return true;
	}
	


}

o objeto pessoaFisica tá preenchido certinho

#2

Abra a pasta lib que vem no zip do hibernate entity manager e leia o arquivo README.txt, nele você vai ver quais jars são necessarios, são necessarios tambem os jars do hibernate core, nesse caso, abra o arquivo README.txt que vem com o hibernate core, e veja quais jars ele precisa.

#3