Problema no AnnotationConfiguration (Eclipse + MySQL)

package action;

import bean.Usuario;
import com.opensymphony.xwork2.ActionSupport;
import dao.UsuarioDao;
public class LoginMovimentacaoAction extends ActionSupport {


	private static final long serialVersionUID = 1L;
	private String chave;
	private String senha;

	
	public String verificaAcesso() {

		Usuario usuario = new Usuario();
		UsuarioDao usuarioDao = new UsuarioDao(); // --> O problema dá nessa chamada!!!

		usuario.setUs_chave(chave.trim());
		usuario.setUs_senha(senha.trim());

		System.out.println(usuario.getUs_senha());
		System.out.println(usuario.getUs_senha());

		try {
			Usuario func = usuarioDao.listarPorLoginSenha(usuario);
			if (func != null) {
				return "acessoAdministrador";
			} else {
				addActionError("Login/Senha incorretos");
				return "falhaLogin";
			}

		} catch (Exception e) {
			e.printStackTrace();
			return "falhaLogin";
		}
		
		

	}
	
	public String verificaAcesso2(){
		return "falhaLogin";
	}
	


	public String getChave() {
		return chave;
	}

	public void setChave(String chave) {
		this.chave = chave;
	}

	public String getSenha() {
		return senha;
	}

	public void setSenha(String senha) {
		this.senha = senha;
	}

	public static long getSerialversionuid() {
		return serialVersionUID;
	}
	
	
}

package bean;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Table;


@Entity
@Table(name = "usuario")
public class Usuario implements Serializable{

	private static final long serialVersionUID = 759576986867169645L;

	@Id
	@Column(name = "us_chave")
	private String us_chave;
	
	@Column(name = "de_nome")
	private String de_nome;
	
	@OneToOne
	@JoinColumn(name="papel_id_papel")
	private Papel papel;
	
	@Column(name = "us_dt_inicio")
	private Date us_dt_inicio;
	
	@Column(name = "us_dt_fim")
	private Date us_dt_fim;
	
	@Column(name = "us_senha")
	private String us_senha;

	public String getUs_chave() {
		return us_chave;
	}

	public void setUs_chave(String usChave) {
		us_chave = usChave;
	}

	public String getDe_nome() {
		return de_nome;
	}

	public void setDe_nome(String deNome) {
		de_nome = deNome;
	}

	public Papel getPapel() {
		return papel;
	}

	public void setPapel(Papel papel) {
		this.papel = papel;
	}

	public Date getUs_dt_inicio() {
		return us_dt_inicio;
	}

	public void setUs_dt_inicio(Date usDtInicio) {
		us_dt_inicio = usDtInicio;
	}

	public Date getUs_dt_fim() {
		return us_dt_fim;
	}

	public void setUs_dt_fim(Date usDtFim) {
		us_dt_fim = usDtFim;
	}

	public String getUs_senha() {
		return us_senha;
	}

	public void setUs_senha(String usSenha) {
		us_senha = usSenha;
	}

	public static long getSerialversionuid() {
		return serialVersionUID;
	}
	
}

<?xml version="1.0" encoding="UTF-8" ?> 
  <!DOCTYPE hibernate-configuration (View Source for full doctype...)> 
- <hibernate-configuration>
- <session-factory>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/projetocast</property> 
  <property name="hibernate.connection.username">guilherme</property> 
  <property name="hibernate.connection.password">senhas</property> 
  <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
- <!--   thread is the short name for
      org.hibernate.context.ThreadLocalSessionContext
      and let Hibernate bind the session automatically to the thread
    
  --> 
  <property name="current_session_context_class">thread</property> 
- <!--  this will show us all sql statements 
  --> 
  <property name="hibernate.show_sql">true</property> 
  <mapping class="bean.Atividade" /> 
  <mapping class="bean.Complexidade" /> 
  <mapping class="bean.Demanda" /> 
  <mapping class="bean.Efetividade" /> 
  <mapping class="bean.Movimentacao" /> 
  <mapping class="bean.Papel_Rel_Atividade" /> 
  <mapping class="bean.Papel" /> 
  <mapping class="bean.Projeto" /> 
  <mapping class="bean.Referencia" /> 
  <mapping class="bean.Usuario_Rel_Projeto" /> 
  <mapping class="bean.Usuario" /> 
  </session-factory>
  </hibernate-configuration>

package bean;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "papel")
public class Papel implements Serializable{

	private static final long serialVersionUID = -4342582894712372469L;

	@Id
	@Column(name = "id_papel")
	@GeneratedValue(strategy = GenerationType.SEQUENCE)
	private Integer id_papel;
	
	@Column(name = "de_papel")
	private String de_papel;

	public Integer getId_papel() {
		return id_papel;
	}

	public void setId_papel(Integer idPapel) {
		id_papel = idPapel;
	}

	public String getDe_papel() {
		return de_papel;
	}

	public void setDe_papel(String dePapel) {
		de_papel = dePapel;
	}

	public static long getSerialversionuid() {
		return serialVersionUID;
	}
	
}