public void AddScore2(string studentId, float score)
        {
            Student student        = _dataManager.GetByKey(studentId);
            Student studentUpdated = _scoreUpdaterMock.UpdateScore((Student)student, score);

            _dataManager.Save(student);
        }
        /* Se puede mejorar el diseño si el ScoreManager sabe guardar
         * objetos Student
         * public void AddScore(string studentId, float score)
         * {
         *  Student student = dataManager.GetByKey(studentId);
         *  dataManager.Save(student);
         *  scoreUpdater.UpdateScore(student, score);
         * }
         */

        public void AddScore(Student student, float score)
        {
            dataManager.Save(student);
            scoreUpdater.UpdateScore(student, score);
        }