public void saveTacher(Teacher teacher) {
   teachersDao.saveTacher(teacher);
   System.out.println("Teacher has been saved " + teacher);
 }
 public Teacher addTeacher(Teacher teacher) {
   teachersDao.addTeacher(teacher);
   System.out.println("Teacher has been added " + teacher);
   return teacher;
 }
 public Teacher getTeacherById(int id) {
   return teachersDao.getTeacherById(id);
 }