Fix some javadoc warning

Author: acogoluegnes

src/main/java/reactor/rabbitmq/ChannelPool.java

@@ -41,14 +41,14 @@ public interface ChannelPool extends AutoCloseable {
     /**
      * The {@link Channel} to use for sending a flux of messages.
      *
-     * @return
+     * @return the channel mono to use
      */
     Mono<? extends Channel> getChannelMono();
 
     /**
      * The closing logic when the {@link Channel} is disposed.
      *
-     * @return
+     * @return the closing logic to use
      */
     BiConsumer<SignalType, Channel> getChannelCloseHandler();
 

src/main/java/reactor/rabbitmq/SendOptions.java

@@ -58,7 +58,7 @@ public SendOptions exceptionHandler(BiConsumer<Sender.SendContext, Exception> ex
     /**
      * Return the channel mono to use to send messages.
      *
-     * @return
+     * @return the channel mono to use
      * @since 1.1.0
      */
     public Mono<? extends Channel> getChannelMono() {
@@ -80,7 +80,7 @@ public SendOptions channelMono(Mono<? extends Channel> channelMono) {
     /**
      * Return the channel closing logic.
      *
-     * @return
+     * @return the closing logic to use
      * @since 1.1.0
      */
     public BiConsumer<SignalType, Channel> getChannelCloseHandler() {

src/main/java/reactor/rabbitmq/SenderOptions.java

@@ -132,7 +132,7 @@ public SenderOptions channelMono(Mono<? extends Channel> channelMono) {
     /**
      * Returns the channel mono to use in send methods.
      *
-     * @return
+     * @return the channel mono to use
      * @since 1.1.0
      */
     public Mono<? extends Channel> getChannelMono() {
@@ -142,7 +142,7 @@ public Mono<? extends Channel> getChannelMono() {
     /**
      * Returns the channel closing logic.
      *
-     * @return
+     * @return the closing logic to use
      * @since 1.1.0
      */
     public BiConsumer<SignalType, Channel> getChannelCloseHandler() {