diff --git a/src/net/java/sip/communicator/impl/protocol/sip/ClientCapabilities.java b/src/net/java/sip/communicator/impl/protocol/sip/ClientCapabilities.java
index 2d215f7d0..b9ea9356a 100644
--- a/src/net/java/sip/communicator/impl/protocol/sip/ClientCapabilities.java
+++ b/src/net/java/sip/communicator/impl/protocol/sip/ClientCapabilities.java
@@ -24,7 +24,7 @@
  * @author Emil Ivov
  */
 public class ClientCapabilities
-    implements MethodProcessor
+    extends MethodProcessorAdapter
 {
     private static Logger logger = Logger.getLogger(ClientCapabilities.class);
 
@@ -136,54 +136,6 @@ public boolean processRequest(RequestEvent requestEvent)
         return true;
     }
 
-    /**
-     * ignore. don't needed.
-     * @param dialogTerminatedEvent unused
-     */
-    public boolean processDialogTerminated(
-                            DialogTerminatedEvent dialogTerminatedEvent)
-    {
-        return false;
-    }
-
-    /**
-     * ignore. don't needed.
-     * @param exceptionEvent unused
-     */
-    public boolean processIOException(IOExceptionEvent exceptionEvent)
-    {
-        return false;
-    }
-
-    /**
-     * ignore for the time being
-     * @param responseEvent unused
-     */
-    public boolean processResponse(ResponseEvent responseEvent)
-    {
-        return false;
-    }
-
-    /**
-     * ignore for the time being.
-     * @param timeoutEvent unused
-     */
-    public boolean processTimeout(TimeoutEvent timeoutEvent)
-    {
-        disconnect();
-        return true;
-    }
-
-    /**
-     * ignore for the time being.
-     * @param transactionTerminatedEvent unused
-     */
-    public boolean processTransactionTerminated(
-        TransactionTerminatedEvent transactionTerminatedEvent)
-    {
-        return false;
-    }
-
     /**
      * Returns the next long to use as a cseq header value.
      * @return the next long to use as a cseq header value.
diff --git a/src/net/java/sip/communicator/impl/protocol/sip/MethodProcessorAdapter.java b/src/net/java/sip/communicator/impl/protocol/sip/MethodProcessorAdapter.java
new file mode 100644
index 000000000..106e5ed3e
--- /dev/null
+++ b/src/net/java/sip/communicator/impl/protocol/sip/MethodProcessorAdapter.java
@@ -0,0 +1,73 @@
+/*
+ * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.sip.communicator.impl.protocol.sip;
+
+import javax.sip.*;
+
+/**
+ * Provides a default implementation of <code>MethodProcessor</code> which does
+ * no processing and exists only as a convenience to extenders so that they can
+ * override the methods of interest.
+ * 
+ * @author Lubomir Marinov
+ */
+public class MethodProcessorAdapter
+    implements MethodProcessor
+{
+
+    /*
+     * Implements
+     * MethodProcessor#processDialogTerminated(DialogTerminatedEvent).
+     */
+    public boolean processDialogTerminated(
+        DialogTerminatedEvent dialogTerminatedEvent)
+    {
+        return false;
+    }
+
+    /*
+     * Implements MethodProcessor#processIOException(IOExceptionEvent).
+     */
+    public boolean processIOException(IOExceptionEvent exceptionEvent)
+    {
+        return false;
+    }
+
+    /*
+     * Implements MethodProcessor#processRequest(RequestEvent).
+     */
+    public boolean processRequest(RequestEvent requestEvent)
+    {
+        return false;
+    }
+
+    /*
+     * Implements MethodProcessor#processResponse(ResponseEvent).
+     */
+    public boolean processResponse(ResponseEvent responseEvent)
+    {
+        return false;
+    }
+
+    /*
+     * Implements MethodProcessor#processTimeout(TimeoutEvent).
+     */
+    public boolean processTimeout(TimeoutEvent timeoutEvent)
+    {
+        return false;
+    }
+
+    /*
+     * Implements
+     * MethodProcessor#processTransactionTerminated(TransactionTerminatedEvent).
+     */
+    public boolean processTransactionTerminated(
+        TransactionTerminatedEvent transactionTerminatedEvent)
+    {
+        return false;
+    }
+}
diff --git a/src/net/java/sip/communicator/impl/protocol/sip/OperationSetBasicInstantMessagingSipImpl.java b/src/net/java/sip/communicator/impl/protocol/sip/OperationSetBasicInstantMessagingSipImpl.java
index 8f834be59..92bc30253 100644
--- a/src/net/java/sip/communicator/impl/protocol/sip/OperationSetBasicInstantMessagingSipImpl.java
+++ b/src/net/java/sip/communicator/impl/protocol/sip/OperationSetBasicInstantMessagingSipImpl.java
@@ -29,19 +29,19 @@
 public class OperationSetBasicInstantMessagingSipImpl
     extends AbstractOperationSetBasicInstantMessaging
 {
-    private static final Logger logger =
-        Logger.getLogger(OperationSetBasicInstantMessagingSipImpl.class);
+    private static final Logger logger
+        = Logger.getLogger(OperationSetBasicInstantMessagingSipImpl.class);
 
     /**
      * A list of processors registered for incoming sip messages.
      */
-    private Vector<SipMessageProcessor> messageProcessors
-                                        = new Vector<SipMessageProcessor>();
+    private final List<SipMessageProcessor> messageProcessors
+        = new Vector<SipMessageProcessor>();
 
     /**
      * The provider that created us.
      */
-    private ProtocolProviderServiceSipImpl sipProvider = null;
+    private final ProtocolProviderServiceSipImpl sipProvider;
 
     /**
      * A reference to the persistent presence operation set that we use
@@ -57,7 +57,8 @@ public class OperationSetBasicInstantMessagingSipImpl
     /**
      * Hashtable containing the message sent
      */
-    private Hashtable sentMsg = null;
+    private final Map<String, Message> sentMsg
+        = new Hashtable<String, Message>(3);
 
     /**
      * It can be implemented in some servers.
@@ -67,7 +68,7 @@ public class OperationSetBasicInstantMessagingSipImpl
     /**
      * Gives access to presence states for the Sip protocol.
      */
-    private SipStatusEnum sipStatusEnum;
+    private final SipStatusEnum sipStatusEnum;
 
     /**
      * Creates an instance of this operation set.
@@ -79,7 +80,7 @@ public class OperationSetBasicInstantMessagingSipImpl
         ProtocolProviderServiceSipImpl provider)
     {
         this.sipProvider = provider;
-        this.sentMsg = new Hashtable(3);
+
         provider.addRegistrationStateChangeListener(new
             RegistrationStateListener());
 
@@ -556,45 +557,15 @@ public void registrationStateChanged(RegistrationStateChangeEvent evt)
      * Class for listening incoming packets.
      */
     private class BasicInstantMessagingMethodProcessor
-        implements MethodProcessor
+        extends MethodProcessorAdapter
     {
-        public boolean processDialogTerminated(
-            DialogTerminatedEvent dialogTerminatedEvent)
-        {
-            // never fired
-            return false;
-        }
-
-        public boolean processIOException(IOExceptionEvent exceptionEvent)
-        {
-            // never fired
-            return false;
-        }
-
-        public boolean processTransactionTerminated(
-            TransactionTerminatedEvent transactionTerminatedEvent)
-        {
-            // nothing to do
-            return false;
-        }
-
-        /**
-         *
-         * @param timeoutEvent TimeoutEvent
-         */
         public boolean processTimeout(TimeoutEvent timeoutEvent)
         {
             synchronized (messageProcessors)
             {
-                Iterator iter = messageProcessors.iterator();
-                while (iter.hasNext())
-                {
-                    SipMessageProcessor listener
-                        = (SipMessageProcessor)iter.next();
-
+                for (SipMessageProcessor listener : messageProcessors)
                     if(!listener.processTimeout(timeoutEvent, sentMsg))
                         return true;
-                }
             }
 
             // this is normaly handled by the SIP stack
@@ -647,7 +618,7 @@ public boolean processTimeout(TimeoutEvent timeoutEvent)
                 // try to retrieve the original message
                 String key = ((CallIdHeader)req.getHeader(CallIdHeader.NAME))
                     .getCallId();
-                failedMessage = (Message) sentMsg.get(key);
+                failedMessage = sentMsg.get(key);
 
                 if (failedMessage == null)
                 {
@@ -686,15 +657,9 @@ public boolean processRequest(RequestEvent requestEvent)
         {
             synchronized (messageProcessors)
             {
-                Iterator iter = messageProcessors.iterator();
-                while (iter.hasNext())
-                {
-                    SipMessageProcessor listener
-                        = (SipMessageProcessor)iter.next();
-
+                for (SipMessageProcessor listener : messageProcessors)
                     if(!listener.processMessage(requestEvent))
                         return true;
-                }
             }
 
             // get the content
@@ -801,15 +766,9 @@ public boolean processResponse(ResponseEvent responseEvent)
         {
             synchronized (messageProcessors)
             {
-                Iterator iter = messageProcessors.iterator();
-                while (iter.hasNext())
-                {
-                    SipMessageProcessor listener
-                        = (SipMessageProcessor)iter.next();
-
+                for (SipMessageProcessor listener : messageProcessors)
                     if(!listener.processResponse(responseEvent, sentMsg))
                         return true;
-                }
             }
 
             Request req = responseEvent.getClientTransaction().getRequest();
@@ -867,7 +826,7 @@ public boolean processResponse(ResponseEvent responseEvent)
             String key = ((CallIdHeader)req.getHeader(CallIdHeader.NAME))
                 .getCallId();
 
-            Message newMessage = (Message) sentMsg.get(key);
+            Message newMessage = sentMsg.get(key);
 
             if (newMessage == null)
             {
@@ -1036,4 +995,3 @@ private void processAuthenticationChallenge(
         }
     }
 }
-
diff --git a/src/net/java/sip/communicator/impl/protocol/sip/SipRegistrarConnection.java b/src/net/java/sip/communicator/impl/protocol/sip/SipRegistrarConnection.java
index 986474aed..bc21fe27d 100644
--- a/src/net/java/sip/communicator/impl/protocol/sip/SipRegistrarConnection.java
+++ b/src/net/java/sip/communicator/impl/protocol/sip/SipRegistrarConnection.java
@@ -25,7 +25,7 @@
  * @author Emil Ivov
  */
 public class SipRegistrarConnection
-    implements MethodProcessor
+    extends MethodProcessorAdapter
 {
     private static final Logger logger =
         Logger.getLogger(SipRegistrarConnection.class);
@@ -1069,26 +1069,6 @@ private void processForbidden(
                 + response.getReasonPhrase());
     }
 
-
-    /**
-    * Process an asynchronously reported DialogTerminatedEvent. When a dialog
-    * transitions to the Terminated state, the stack keeps no further records
-    * of the dialog. This notification can be used by applications to clean up
-    * any auxiliary data that is being maintained for the given dialog.
-    *
-    * @param dialogTerminatedEvent -- an event that indicates that the dialog
-    *            has transitioned into the terminated state.
-    * @return <tt>true</tt> if the specified event has been handled by this
-    *         processor and shouldn't be offered to other processors registered
-    *         for the same method; <tt>false</tt>, otherwise
-    * @since v1.2
-    */
-    public boolean processDialogTerminated(DialogTerminatedEvent
-                                        dialogTerminatedEvent)
-    {
-        return false;
-    }
-
     /**
     * Processes a Request received on a SipProvider upon which this SipListener
     * is registered.
@@ -1128,24 +1108,6 @@ public boolean processTimeout(TimeoutEvent timeoutEvent)
         return true;
     }
 
-    /**
-    * Process an asynchronously reported TransactionTerminatedEvent. When a
-    * transaction transitions to the Terminated state, the stack keeps no
-    * further records of the transaction.
-    *
-    * @param transactionTerminatedEvent an event that indicates that the
-    *            transaction has transitioned into the terminated state.
-    * @return <tt>true</tt> if the specified event has been handled by this
-    *         processor and shouldn't be offered to other processors registered
-    *         for the same method; <tt>false</tt>, otherwise
-    */
-    public boolean processTransactionTerminated(TransactionTerminatedEvent
-                                            transactionTerminatedEvent)
-    {
-        //doesn't mean anything. we do failure handling in processTimeout
-        return false;
-    }
-
     /**
     * Process an asynchronously reported IO Exception.
     *