step 2

src/hackingrace/HackerThread.java

 package hackingrace;
-
+//Base Hacker Thread:
 public abstract  class HackerThread extends  Thread {
 protected  final Vault vault;
 public  HackerThread(Vault vault,String name)
@@ -9,10 +9,11 @@ public  HackerThread(Vault vault,String name)
 }
 
 
-
+// Subclasses must implement their specific guessing strategy
 
 @Override
     public abstract void run();
+//Called when the correct password is found
 protected void onHacked(int password){
     System.out.printf("*** % WINS! The vault has been hacked with password: %d ****\n",
             this.getName(),password);