PersonWithJavaBeans.java

public final class Person {
    private String firstName;
    private String lastName;
    private String middleName = "";
    private String facebookId = "";
    private String twitterId = "";

    public Person() {}

    //Setters
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }

    public void setFacebookId(String facebookId) {
        this.facebookId = facebookId;
    }

    public void setTwitterId(String twitterId) {
        this.twitterId = twitterId;
    }
}