Spring is not saving data in Mysql

Question

spring is not saving data in mysql.

The table is created, but after creation the lines are nulls.

//class
@Component
public class DataInicializr implements ApplicationListener<ContextRefreshedEvent> {

    @Autowired
    UserRepository userRepository;

    @Override
    public void onApplicationEvent(ContextRefreshedEvent arg0) {
        //Sempre vai rodar no inicio da aplicacao
        User user = new User();
        user.setEmail("jaraujo@gmail.com");
        user.setNome("Jorge David");        
        userRepository.save(user);              
    }
}