Make QueueHandlerFactory final.

I don't think there's a good reason to change it without ditching
the entire output queue.

irc/src/com/dmdirc/parser/irc/outputqueue/OutputQueue.java

@@ -47,46 +47,40 @@ public class OutputQueue {
     /** Thread for the sending queue. */
     private QueueHandler queueHandler;
     /** The QueueHandlerFactory for this OutputQueue. */
-    private QueueHandlerFactory queueHandlerFactory = PriorityQueueHandler.getFactory();
+    private final QueueHandlerFactory queueHandlerFactory;
 
     /**
-     * Set the output stream for this queue.
-     *
-     * @param outputStream Output Stream to use.
+     * Creates a new output queue using the default handler.
      */
-    public void setOutputStream(final OutputStream outputStream) {
-        this.out = new PrintWriter(outputStream, true);
+    public OutputQueue() {
+        this(PriorityQueueHandler.getFactory());
     }
 
     /**
-     * Is output queueing enabled?
+     * Creates a new output queue using a handler from the given factory.
      *
-     * @return true if output queueing is enabled.
+     * @param queueHandlerFactory The factory to use to create {@link QueueHandler}s.
      */
-    public boolean isQueueEnabled() {
-        return queueEnabled;
+    public OutputQueue(final QueueHandlerFactory queueHandlerFactory) {
+        this.queueHandlerFactory = queueHandlerFactory;
     }
 
     /**
-     * Set the QueueHandlerFactory.
-     * Changing this will not change an existing QueueHandler unless queueing is
-     * disabled and reenabled.
-     * If this is called before the first lien of output is queued then there is
-     * no need to disable and reenable the queue.
+     * Set the output stream for this queue.
      *
-     * @param factory New QueueHandlerFactory to use.
+     * @param outputStream Output Stream to use.
      */
-    public void setQueueHandlerFactory(final QueueHandlerFactory factory) {
-        queueHandlerFactory = factory;
+    public void setOutputStream(final OutputStream outputStream) {
+        this.out = new PrintWriter(outputStream, true);
     }
 
     /**
-     * Get the QueueHandlerFactory.
+     * Is output queueing enabled?
      *
-     * @return The current QueueHandlerFactory.
+     * @return true if output queueing is enabled.
      */
-    public QueueHandlerFactory getQueueHandlerFactory() {
-        return queueHandlerFactory;
+    public boolean isQueueEnabled() {
+        return queueEnabled;
     }
 
     /**