Added id to Person class

Signed-off-by: Jim Martens <github@2martens.de>

02/src/de/dis2017/data/Person.java

@@ -1,10 +1,13 @@
 package de.dis2017.data;
 
 public class Person {
+	private int id = -1;
 	private String firstName;
 	private String name;
 	private String address;
 	
+	public int getId() { return id; }
+	public void setId(int id) { this.id = id; }
 	public String getFirstName() {
 		return firstName;
 	}