log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.exception.SQLGrammarException: could not execute query
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
   at org.hibernate.loader.Loader.doList(Loader.java:2235)
   at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
   at org.hibernate.loader.Loader.list(Loader.java:2124)
   at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
   at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363)
   at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1149)
   at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
   at dao.GenericDao.findAll(GenericDao.java:34)
   at teste1.hibernateteste.main(hibernateteste.java:18)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.users users0_' at line 1
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
   at java.lang.reflect.Constructor.newInstance(Unknown Source)
   at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
   at com.mysql.jdbc.Util.getInstance(Util.java:386)
   at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4120)
   at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4052)
   at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2503)
   at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2664)
   at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815)
   at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
   at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322)
   at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
   at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
   at org.hibernate.loader.Loader.doQuery(Loader.java:697)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
   at org.hibernate.loader.Loader.doList(Loader.java:2232)
   ... 9 more
Exception in thread "main" java.lang.NullPointerException
   at teste1.hibernateteste.main(hibernateteste.java:19)

package teste1;


import java.util.ArrayList;
import java.util.List;

import model.*;
import dao.*;
public class hibernateteste {

   /**
    * @param args
    */
   public static void main(String[] args) {
    Users user = new  Users();
    List<Users> users = new ArrayList<Users>();
    GenericDao<Users> userDAO = new GenericDao<Users>("Users");
    users = userDAO.findAll();
    for(int i=0;i<users.size();i++)
    {
       System.out.println(users.get(i).getNom()+" "+ users.get(i).getPrenom());
    }
   }
 
}

package model;

// Generated 22 juil. 2013 14:18:18 by Hibernate Tools 3.4.0.CR1

import java.util.HashSet;
import java.util.Set;

/**
* Users generated by hbm2java
*/
public class Users implements java.io.Serializable {

   private Integer id;
   private Roles roles;
   private String nom;
   private String prenom;
   private String adresse;
   private String tel;
   private String email;
   private String password;
   private Set postulers = new HashSet(0);
   private Set cvs = new HashSet(0);
   private Set actualites = new HashSet(0);
   private Set offres = new HashSet(0);

   public Users() {
   }

   public Users(Roles roles, String nom, String prenom, String adresse,
         String tel, String email, String password) {
      this.roles = roles;
      this.nom = nom;
      this.prenom = prenom;
      this.adresse = adresse;
      this.tel = tel;
      this.email = email;
      this.password = password;
   }

   public Users(Roles roles, String nom, String prenom, String adresse,
         String tel, String email, String password, Set postulers, Set cvs,
         Set actualites, Set offres) {
      this.roles = roles;
      this.nom = nom;
      this.prenom = prenom;
      this.adresse = adresse;
      this.tel = tel;
      this.email = email;
      this.password = password;
      this.postulers = postulers;
      this.cvs = cvs;
      this.actualites = actualites;
      this.offres = offres;
   }

   public Integer getId() {
      return this.id;
   }

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

   public Roles getRoles() {
      return this.roles;
   }

   public void setRoles(Roles roles) {
      this.roles = roles;
   }

   public String getNom() {
      return this.nom;
   }

   public void setNom(String nom) {
      this.nom = nom;
   }

   public String getPrenom() {
      return this.prenom;
   }

   public void setPrenom(String prenom) {
      this.prenom = prenom;
   }

   public String getAdresse() {
      return this.adresse;
   }

   public void setAdresse(String adresse) {
      this.adresse = adresse;
   }

   public String getTel() {
      return this.tel;
   }

   public void setTel(String tel) {
      this.tel = tel;
   }

   public String getEmail() {
      return this.email;
   }

   public void setEmail(String email) {
      this.email = email;
   }

   public String getPassword() {
      return this.password;
   }

   public void setPassword(String password) {
      this.password = password;
   }

   public Set getPostulers() {
      return this.postulers;
   }

   public void setPostulers(Set postulers) {
      this.postulers = postulers;
   }

   public Set getCvs() {
      return this.cvs;
   }

   public void setCvs(Set cvs) {
      this.cvs = cvs;
   }

   public Set getActualites() {
      return this.actualites;
   }

   public void setActualites(Set actualites) {
      this.actualites = actualites;
   }

   public Set getOffres() {
      return this.offres;
   }

   public void setOffres(Set offres) {
      this.offres = offres;
   }

}

package dao;

import util.HibernateUtil;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;

/**
*
* @author uchiha itachi
*/
public class GenericDao<T> {
    Session session = null;
    String Table =null;
    public GenericDao(String table) {
        Table=table;
    }
    public void OpenSess()
    {
        session =  HibernateUtil.currentSession();
        session.beginTransaction().begin();
    }
    public void CloseSess()
    {
        session.beginTransaction().commit();
    }
    public List<T> findAll()
    {
        List<T> listeT = null;
        try
        {
            OpenSess();
            listeT=(List<T>)session.createQuery ("from "+Table).list();
            CloseSess();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return listeT;
    }
   
   /* public T findByID(String IDT,String coloneID)
    {
        List<T> listeT = null;
        try
        {
           OpenSess();           
           listeT= (List<T>)session.createQuery ("from "+Table+" as Alias where Alias."+coloneID+"='"+IDT+"'").list();
           CloseSess();
        }
        catch(Exception e)
        {e.printStackTrace();}
        return listeT.get(0);
    }*/
    public List<T> findByID(String IDT,String coloneID)
    {
        List<T> listeT = null;
        try
        {
           OpenSess();           
           listeT= (List<T>)session.createQuery ("from "+Table+" as Alias where Alias."+coloneID+"='"+IDT+"'").list();
           CloseSess();
        }
        catch(Exception e)
        {e.printStackTrace();}
        return listeT;
    }
    public void Save(T instance)
    {
       
        OpenSess();
        session.saveOrUpdate(instance);
        CloseSess();
    }
    public void Merge(T instance )
    {
       OpenSess();
        session.merge(instance);
        CloseSess();
    }
    public void Supprimer(T instance)
    {
        OpenSess();
        session.delete(instance);
        CloseSess();
    }
   
}

package util;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;

/**
* Hibernate Utility class with a convenient method to get Session Factory
* object.
*
* @author uchiha itachi
*/
public class HibernateUtil {

    private static final SessionFactory sessionFactory;
   
    static {
        try {
            // Create the SessionFactory from standard (hibernate.cfg.xml)
            // config file.
            sessionFactory = new Configuration().configure("/hibernate.cfg.xml").buildSessionFactory();
        } catch (Throwable ex) {
            // Log the exception.
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }
    public static final ThreadLocal session = new ThreadLocal();

    public static Session currentSession()
                   throws HibernateException {
      Session s = (Session) session.get();
      // Ouvre une nouvelle Session, si ce Thread n'en a aucune
      if (s == null) {
      s = sessionFactory.openSession();
      session.set(s);
      }
      return s;
      }
    public static SessionFactory getSessionFactory() {
       
       return sessionFactory;
    }
}

<?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>
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost/bdcorporatesoftware</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.default_catalog">bdcorporatesoftware</property>
        <property name="hibernate.default_schema">bdcorporatesoftware</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
         <mapping resource="model/Offre.hbm.xml" />
        <mapping resource="model/Postuler.hbm.xml" />
        <mapping resource="model/Users.hbm.xml" />
        <mapping resource="model/Actualite.hbm.xml" />
        <mapping resource="model/Cv.hbm.xml" />
        <mapping resource="model/Roles.hbm.xml" />
    </session-factory>
</hibernate-configuration>