Créer une méthode qui permet de préparer un test de manière auto

package tn.esen.services.gestion.test;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

import tn.esen.entities.Candidat;
import tn.esen.entities.Resultat;
import tn.esen.entities.Test;

/**


* Session Bean implementation class GestionTest

*/
@Stateless
public class GestionTest implements GestionTestRemote, GestionTestLocal {
 @PersistenceContext
 private EntityManager entityManager;
    /**


* Default constructor. 

*/
    public GestionTest() {
        // TODO Auto-generated constructor stub
    }
 @Override
 public boolean addTest(Test test) {
  try {
   entityManager.persist(test);
   return true;
  } catch (Exception e) {
   System.err.println("Impossible de créer un Test");
  }  return false;
 }
 @Override
 public boolean updateTest(Test test) {
  try {
   entityManager.merge(test);
   return true;
  } catch (Exception e) {
   System.err.println("Impossible de mettre à jour un test");
  }  return false;
 }
 @Override
 public boolean deleteTest(Test test) {
  
  try {
   entityManager.remove(entityManager.merge(test));
   return true;
  } catch (Exception e) {
   System.err.println("Impossible de supprimer un test");
  }  return false;
 }
 @Override
 public List<Test> readAllTest() {
  String jpql = "select t from Test t ";
  Query query = entityManager.createQuery(jpql);
  return query.getResultList();  
 }
 @Override
 public Test findTestById(Integer id) {
  return (Test) entityManager.find(Test.class, id);
 }
 @Override
 public List<Test> findAllTestByCandidat(Candidat candidat) {
    Query query=entityManager.createQuery("select distinct t from Test t join t.resultats r where r.candidat=:cand");
    query.setParameter("cand", candidat);
    return query.getResultList();