A simple model for demonstrating the data builder pattern

DBPModel.java

public class User
{
  private String firstName;
  private String surname;
  private int age;
  private String emailAddress;
}

//Then you could do the following
public void setFirstName(String firstName)
{
  firstName = firstName;
}
//Repeating for all the properties.
//Most IDEs will auto generate this for you now adays

//Or if you are using Java, you could take advantage of lombok, https://github.com/rzwitserloot/lombok
//Would look something like this
@Getter @Setter
private String firstName
//lombok would then create the getters and setters for you.