User.java

package br.com.brunokrebs.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class User {
	@Id
	@GeneratedValue
	private long id;
	
	// ... other instance fields and constructors ...

	public long getId() {
		return id;
	}

	// ... other getters ...
}