@Entity                        // javax.persistence
@Table(name = "supplier")      // javax.persistence
public class Supplier {

    @Id                        // javax.persistence
    private Long id;

    private String brand;
    private String phone;
    private String address;

    public Supplier(){

    }

    // public getters and setters for all fields
    // omitted for brevity
}

/* Do this only if you want to inject a Supplier somewhere. */
@Bean
public Supplier supplier(){
    /* define here how a default Supplier should look like */
    return new Supplier();
}