Don't create an event, call the method directly.

contactlist/src/com/dmdirc/addons/contactlist/ContactListCommand.java

@@ -31,7 +31,6 @@ import com.dmdirc.commandparser.commands.Command;
 import com.dmdirc.commandparser.commands.IntelligentCommand;
 import com.dmdirc.commandparser.commands.context.ChannelCommandContext;
 import com.dmdirc.commandparser.commands.context.CommandContext;
-import com.dmdirc.events.NickListClientsChangedEvent;
 import com.dmdirc.interfaces.CommandController;
 import com.dmdirc.ui.input.AdditionalTabTargets;
 
@@ -65,8 +64,7 @@ public class ContactListCommand extends Command implements IntelligentCommand {
 
         final ContactListListener listener = new ContactListListener(chanContext.getChannel());
         listener.addListeners();
-        listener.handleClientsUpdated(new NickListClientsChangedEvent(chanContext.getChannel(),
-                chanContext.getChannel().getUsers()));
+        chanContext.getChannel().getUsers().forEach(listener::clientAdded);
     }
 
     @Override

contactlist/src/com/dmdirc/addons/contactlist/ContactListListener.java

@@ -93,7 +93,7 @@ public class ContactListListener {
         removeListeners();
     }
 
-    private void clientAdded(final GroupChatUser client) {
+    void clientAdded(final GroupChatUser client) {
         final Query query = groupChat.getConnection().get()
                 .getQuery(client.getNickname(), false);