Just some tiny javadocs optimizations

buffer/src/main/java/io/netty/buffer/SwappedByteBuf.java

@@ -24,6 +24,9 @@ import java.nio.channels.GatheringByteChannel;
 import java.nio.channels.ScatteringByteChannel;
 import java.nio.charset.Charset;
 
+/**
+ * Wrapper which swap the {@link ByteOrder} of a {@link ByteBuf}.
+ */
 public final class SwappedByteBuf extends ByteBuf {
 
     private final ByteBuf buf;

common/src/main/java/io/netty/util/concurrent/CompleteFuture.java

@@ -34,6 +34,9 @@ public abstract class CompleteFuture<V> extends AbstractFuture<V> {
         this.executor = executor;
     }
 
+    /**
+     * Return the {@link EventExecutor} which is used by this {@link CompleteFuture}.
+     */
     protected EventExecutor executor() {
         return executor;
     }

common/src/main/java/io/netty/util/concurrent/CompletePromise.java

@@ -1,84 +0,0 @@
-/*
- * 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.
- */
-package io.netty.util.concurrent;
-
-
-public abstract class CompletePromise<V> extends CompleteFuture<V> implements Promise<V> {
-
-    protected CompletePromise(EventExecutor executor) {
-        super(executor);
-    }
-
-    @Override
-    public Promise<V> setFailure(Throwable cause) {
-        throw new IllegalStateException();
-    }
-
-    @Override
-    public boolean tryFailure(Throwable cause) {
-        return false;
-    }
-
-    @Override
-    public Promise<V> setSuccess(V result) {
-        throw new IllegalStateException();
-    }
-
-    @Override
-    public boolean trySuccess(V result) {
-        return false;
-    }
-
-    @Override
-    public Promise<V> await() throws InterruptedException {
-        return this;
-    }
-
-    @Override
-    public Promise<V> awaitUninterruptibly() {
-        return this;
-    }
-
-    @Override
-    public Promise<V> syncUninterruptibly() {
-        return this;
-    }
-
-    @Override
-    public Promise<V> sync() throws InterruptedException {
-        return this;
-    }
-
-    @Override
-    public Promise<V> addListener(GenericFutureListener<? extends Future<? super V>> listener) {
-        return (Promise<V>) super.addListener(listener);
-    }
-
-    @Override
-    public Promise<V> addListeners(GenericFutureListener<? extends Future<? super V>>... listeners) {
-        return (Promise<V>) super.addListeners(listeners);
-    }
-
-    @Override
-    public Promise<V> removeListener(GenericFutureListener<? extends Future<? super V>> listener) {
-        return (Promise<V>) super.removeListener(listener);
-    }
-
-    @Override
-    public Promise<V> removeListeners(GenericFutureListener<? extends Future<? super V>>... listeners) {
-        return (Promise<V>) super.removeListeners(listeners);
-    }
-}

common/src/main/java/io/netty/util/concurrent/DefaultEventExecutorGroup.java

@@ -23,10 +23,19 @@ import java.util.concurrent.ThreadFactory;
  */
 public class DefaultEventExecutorGroup extends MultithreadEventExecutorGroup {
 
+    /**
+     * @see {@link #DefaultEventExecutorGroup(int, ThreadFactory)}
+     */
     public DefaultEventExecutorGroup(int nThreads) {
         this(nThreads, null);
     }
 
+    /**
+     * Create a new instance.
+     *
+     * @param nThreads          the number of threads that will be used by this instance.
+     * @param threadFactory     the ThreadFactory to use, or {@code null} if the default should be used.
+     */
     public DefaultEventExecutorGroup(int nThreads, ThreadFactory threadFactory) {
         super(nThreads, threadFactory);
     }