UserService.java

public interface UserService {
  User getUser();
  void processSomeEx(String some);
  void save(User user);
}

public class UserServiceImpl implements UserService {
  
  @Override
  public User getUser() {
    return this.userRepository.getUser();
  }
  
  @Override
  public void processSomeEx(String some) {
    this.someProcessorService.process(some);
  }
  
  @Override
  public void save(User user) {
    this.userRepository.save(user);
  }
  
}