Squash a few Javadoc warnings

Author: acogoluegnes

src/main/java/com/rabbitmq/stream/BackOffDelayPolicy.java

@@ -32,7 +32,7 @@ public interface BackOffDelayPolicy {
    * A policy with a constant delay.
    *
    * @param delay
-   * @return
+   * @return the constant delay policy
    */
   static BackOffDelayPolicy fixed(Duration delay) {
     return new FixedWithInitialDelayBackOffPolicy(delay, delay);
@@ -43,7 +43,7 @@ static BackOffDelayPolicy fixed(Duration delay) {
    *
    * @param initialDelay
    * @param delay
-   * @return
+   * @return the policy with an initial delay
    */
   static BackOffDelayPolicy fixedWithInitialDelay(Duration initialDelay, Duration delay) {
     return new FixedWithInitialDelayBackOffPolicy(initialDelay, delay);
@@ -55,7 +55,7 @@ static BackOffDelayPolicy fixedWithInitialDelay(Duration initialDelay, Duration
    * @param initialDelay
    * @param delay
    * @param timeout
-   * @return
+   * @return the policy with an initial delay
    */
   static BackOffDelayPolicy fixedWithInitialDelay(
       Duration initialDelay, Duration delay, Duration timeout) {

src/main/java/com/rabbitmq/stream/EnvironmentBuilder.java

@@ -329,7 +329,7 @@ interface TlsConfiguration {
      * <p>Use {@link SslContextBuilder#forClient()} to configure and create an instance.
      *
      * @param sslContext
-     * @return
+     * @return the TLS configuration helper
      */
     TlsConfiguration sslContext(SslContext sslContext);
 

src/main/java/com/rabbitmq/stream/MessageHandler.java

@@ -36,7 +36,7 @@ interface Context {
     /**
      * The offset of the message in the stream.
      *
-     * @return
+     * @return the offset of the current message
      */
     long offset();
 
@@ -50,7 +50,7 @@ interface Context {
     /**
      * The consumer that receives the message.
      *
-     * @return
+     * @return the consumer instance
      * @see Consumer#store(long)
      */
     Consumer consumer();

src/main/java/com/rabbitmq/stream/sasl/SaslMechanism.java

@@ -20,7 +20,7 @@ public interface SaslMechanism {
   /**
    * The name of the SASL mechanism.
    *
-   * @return
+   * @return the name of the SASL mechanism
    */
   String getName();
 

src/main/java/com/rabbitmq/stream/sasl/UsernamePasswordCredentialsProvider.java

@@ -20,14 +20,14 @@ public interface UsernamePasswordCredentialsProvider extends CredentialsProvider
   /**
    * The username
    *
-   * @return
+   * @return the username
    */
   String getUsername();
 
   /**
    * The password
    *
-   * @return
+   * @return the password
    */
   String getPassword();
 }