Struts 2 + Hibernate

public class HibernateUtil {
	private static SessionFactory sessionFactory;
	
	static {
		Configuration cfg = new AnnotationConfiguration();
		cfg.configure();		
		sessionFactory = cfg.buildSessionFactory(); // Depois da chamada desse metodo o usuario é excluido!
	}
	
	public static Session getSession(){
		return sessionFactory.openSession();
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
                                         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
 <session-factory name="">
  <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="connection.url">jdbc:mysql://localhost/pousada</property>
  <property name="connection.username">root</property>
  <property name="connection.password"/>
  <!-- JDBC connection pool (use the built-in) -->
  <property name="connection.pool_size">1</property>
  <!-- SQL dialect -->
  <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
  <!-- Enable Hibernate's automatic session context management -->
  <property name="current_session_context_class">thread</property>
  <!-- Disable the second-level cache -->
  <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
  <!-- Echo all executed SQL to stdout -->
  <property name="show_sql">true</property>
  <property name="connection.useUnicode">true</property>
  <property name="connection.characterEncoding">UTF-8</property>
  <property name="hibernate.hbm2ddl.auto">create-drop</property>
  <mapping class="br.com.pousada.entidades.Produto"/>
  <mapping class="br.com.pousada.entidades.Quarto"/>
  <mapping class="br.com.pousada.entidades.Hospede"/>
  <mapping class="br.com.pousada.entidades.Usuario"/>
  <mapping class="br.com.pousada.entidades.Perfil"/>
 </session-factory>
</hibernate-configuration>