Improve javadoc for all addons (#15667)

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/ChannelStateUpdateListener.java

@@ -44,7 +44,7 @@ public interface ChannelStateUpdateListener {
      * The channel is of kind Trigger.
      *
      * @param channelUID The channel uid
-     * @param value The new value. Doesn't necessarily need to be different than the value before.
+     * @param eventPayload The new value. Doesn't necessarily need to be different than the value before.
      */
     void triggerChannel(ChannelUID channelUID, String eventPayload);
 }

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/mapping/AbstractMqttAttributeClass.java

@@ -41,7 +41,7 @@ import org.slf4j.LoggerFactory;
  * To automatically subscribe to all fields, a call to
  * {@link #subscribeAndReceive(MqttBrokerConnection, ScheduledExecutorService, String, AttributeChanged, int)} is
  * required.
- * Unsubscribe with a call to {@link #unsubscribe(AbstractMqttAttributeClass)}.
+ * Unsubscribe with a call to {@link #unsubscribe()}.
  * </p>
  *
  * <p>
@@ -134,8 +134,6 @@ public abstract class AbstractMqttAttributeClass implements SubscribeFieldToMQTT
     /**
      * Unsubscribe from all topics of the managed object.
      *
-     * @param connection A broker connection to remove the subscriptions from.
-     * @param objectWithFields A bean class
      * @return Returns a future that completes as soon as all unsubscriptions have been performed.
      */
     public CompletableFuture<@Nullable Void> unsubscribe() {

bundles/org.openhab.binding.mqtt.generic/src/main/java/org/openhab/binding/mqtt/generic/tools/ChildMap.java

@@ -67,7 +67,6 @@ public class ChildMap<T> {
     /**
      * Modifies the map in way that it matches the entries of the given childIDs.
      *
-     * @param future A future that completes as soon as all children have their added-action performed.
      * @param childIDs The list of IDs that should be in the map. Everything else currently in the map will be removed.
      * @param addedAction A function where the newly added child is given as an argument to perform any actions on it.
      *            A future is expected as a return value that completes as soon as said action is performed.
@@ -75,7 +74,7 @@ public class ChildMap<T> {
      *            expected as a
      *            result.
      * @param removedCallback A callback, that is called whenever a child got removed by the
-     *            {@link #apply(CompletableFuture, String[], Function)} method.
+     *            {@link #apply(String[], Function, Function, Consumer)} method.
      * @return Complete successfully if all "addedAction" complete successfully, otherwise complete exceptionally.
      */
     public CompletableFuture<@Nullable Void> apply(String[] childIDs,