diff --git a/src/net/java/sip/communicator/service/protocol/OperationSetTelephonyConferencing.java b/src/net/java/sip/communicator/service/protocol/OperationSetTelephonyConferencing.java
index 130bf8075..00b823394 100644
--- a/src/net/java/sip/communicator/service/protocol/OperationSetTelephonyConferencing.java
+++ b/src/net/java/sip/communicator/service/protocol/OperationSetTelephonyConferencing.java
@@ -7,9 +7,8 @@
 package net.java.sip.communicator.service.protocol;
 
 /**
- * Provides operations necessary to create and handle conferencing calls. This
- * interface does
- *
+ * Provides operations necessary to create and handle conferencing calls.
+ * 
  * @author Emil Ivov
  */
 public interface OperationSetTelephonyConferencing
@@ -18,30 +17,33 @@ public interface OperationSetTelephonyConferencing
     /**
      * Creates a conference call with the specified callees as call
      * participants.
-     *
-     * @param callees the list of addresses that we should call
+     * 
+     * @param callees
+     *            the list of addresses that we should call
      * @return the newly created conference call containing all CallParticipants
-     * @throws OperationNotSupportedException if the provider does not have any
-     * conferencing features.
+     * @throws OperationNotSupportedException
+     *             if the provider does not have any conferencing features.
      */
     public Call createConfCall(String[] callees)
         throws OperationNotSupportedException;
 
     /**
-     * Invitites the callee represented by the specified uri to an already
+     * Invites the callee represented by the specified uri to an already
      * existing call. The difference between this method and createConfCall is
      * that inviteCalleeToCall allows a user to transform an existing 1 to 1
      * call into a conference call, or add new participants to an already
      * established conference.
-     *
-     * @param uri the callee to invite to an existing conf call.
-     * @param existingCall the call that we should invite the callee to.
+     * 
+     * @param uri
+     *            the callee to invite to an existing conf call.
+     * @param existingCall
+     *            the call that we should invite the callee to.
      * @return the CallParticipant object corresponding to the callee
-     * represented by the specified uri.
-     * @throws OperationNotSupportedException if allowing additional callees to
-     * a pre-established call is not supported.
+     *         represented by the specified uri.
+     * @throws OperationNotSupportedException
+     *             if allowing additional callees to a pre-established call is
+     *             not supported.
      */
     public CallParticipant inviteCalleeToCall(String uri, Call existingCall)
         throws OperationNotSupportedException;
-
 }
diff --git a/src/net/java/sip/communicator/service/protocol/event/RegistrationStateChangeListener.java b/src/net/java/sip/communicator/service/protocol/event/RegistrationStateChangeListener.java
index 5b6828c18..8738c1776 100644
--- a/src/net/java/sip/communicator/service/protocol/event/RegistrationStateChangeListener.java
+++ b/src/net/java/sip/communicator/service/protocol/event/RegistrationStateChangeListener.java
@@ -4,22 +4,27 @@
  * Distributable under LGPL license.
  * See terms of license at gnu.org.
  */
-
 package net.java.sip.communicator.service.protocol.event;
 
+import java.util.*;
+
 /**
  * An event listener that should be implemented by parties interested in changes
- * that occur in the registration state of a ProtocolProvider.
+ * that occur in the registration state of a
+ * <code>ProtocolProviderService</code>.
+ * 
  * @author Emil Ivov
  */
-public interface RegistrationStateChangeListener extends java.util.EventListener
+public interface RegistrationStateChangeListener
+    extends EventListener
 {
     /**
-     * The method is called by a ProtocolProvider implementation whenver
-     * a change in the registration state of the corresponding provider had
-     * occurred.
-     * @param evt ProviderStatusChangeEvent the event describing the status
-     * change.
+     * The method is called by a <code>ProtocolProviderService</code>
+     * implementation whenever a change in the registration state of the
+     * corresponding provider had occurred.
+     * 
+     * @param evt
+     *            the event describing the status change.
      */
     public void registrationStateChanged(RegistrationStateChangeEvent evt);
 }