Dog.java

public class Dog {

   private String colour = null;
   private String bark = null;

   public String getColour() {
      return colour;
   }
   public void setColour(String colour) {
      this.colour = colour;
   }

   public String getBark() {
      return bark;
   }
   public void setBark(String bark) {
      this.bark = bark;
   }
}