diff --git a/transport/src/main/java/io/netty/channel/socket/nio/NioEventLoop.java b/transport/src/main/java/io/netty/channel/socket/nio/NioEventLoop.java
index 970127db15..4335d2ee91 100644
--- a/transport/src/main/java/io/netty/channel/socket/nio/NioEventLoop.java
+++ b/transport/src/main/java/io/netty/channel/socket/nio/NioEventLoop.java
@@ -14,6 +14,22 @@
  * under the License.
  */
 
+/*
+ * Copyright 2012 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
 /*
  * Copyright 2012 The Netty Project
  *
@@ -144,7 +160,7 @@ public final class NioEventLoop extends SingleThreadEventLoop {
         }
     }
 
-    void executeWhenWritable(AbstractNioChannel channel, NioTask<? extends SelectableChannel> task) {
+    void executeWhenWritable(AbstractNioChannel channel, NioTask<SelectableChannel> task) {
         if (channel == null) {
             throw new NullPointerException("channel");
         }
@@ -154,7 +170,7 @@ public final class NioEventLoop extends SingleThreadEventLoop {
         }
 
         SelectionKey key = channel.selectionKey();
-        channel.writableTasks.offer((NioTask<SelectableChannel>) task);
+        channel.writableTasks.offer(task);
         key.interestOps(key.interestOps() | SelectionKey.OP_WRITE);
     }
 
@@ -388,7 +404,7 @@ public final class NioEventLoop extends SingleThreadEventLoop {
         if (ch.writableTasks.isEmpty()) {
             ch.unsafe().flushNow();
         } else {
-            NioTask<SelectableChannel> task = null;
+            NioTask<SelectableChannel> task;
             for (;;) {
                 task = ch.writableTasks.poll();
                 if (task == null) { break; }
@@ -399,7 +415,7 @@ public final class NioEventLoop extends SingleThreadEventLoop {
     }
 
     private static void unregisterWritableTasks(AbstractNioChannel ch) {
-        NioTask<SelectableChannel> task = null;
+        NioTask<SelectableChannel> task;
         for (;;) {
             task = ch.writableTasks.poll();
             if (task == null) {