Added default reasons to HandshakeRejectionEvent

src/main/java/envoy/event/HandshakeRejectionEvent.java

@@ -1,5 +1,7 @@
 package envoy.event;
 
+import envoy.data.LoginCredentials;
+
 /**
  * Signifies to the client that the handshake failed for the attached
  * reason.<br>
@@ -13,6 +15,28 @@ package envoy.event;
  */
 public class HandshakeRejectionEvent implements Event<String> {
 
+	/**
+	 * Select this value if a given password hash was incorrect
+	 */
+	public static final String WRONG_PASSWORD = "an incorrect password was entered";
+
+	/**
+	 * Select this value if a given {@link LoginCredentials} pointed at a client who
+	 * is already online
+	 */
+	public static final String ALREADY_ONLINE = "user is already online";
+
+	/**
+	 * Select this value if a given {@link LoginCredentials} pointed at a client who
+	 * does not exist
+	 */
+	public static final String USER_DOES_NOT_EXIST = "user does not exist";
+
+	/**
+	 * Select this value if an unknown error occurred
+	 */
+	public static final String UNKNOWN_REASON = "cause of failure is unknown";
+
 	private final String reason;
 
 	private static final long serialVersionUID = -8723270093452609197L;