Where's the syntax error in my POJO?

package org.teamtreehouse.contactmgr.model

public class Contact{
  private Integer id;
  private String firstName;
  private String lastName;
  private String email;
  public Integer getId() {return id;}
  public Integer setId() {this.id = id;}

    public String getFirstName() {return firstName;}

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

    public String getLastName() {return lastName;}

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

    public String getEmail() {return email;}

    public void setEmail(String email) {this.email = email;}
}