Improve javadoc for some addons (#15701)

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

bundles/org.openhab.binding.livisismarthome/src/main/java/org/openhab/binding/livisismarthome/internal/handler/LivisiBridgeHandler.java

@@ -84,10 +84,10 @@ import org.slf4j.LoggerFactory;
 /**
  * The {@link LivisiBridgeHandler} is responsible for handling the LIVISI SmartHome controller including the connection
  * to the LIVISI SmartHome backend for all communications with the LIVISI SmartHome {@link DeviceDTO}s.
- * <p/>
+ * <p>
  * It implements the {@link AccessTokenRefreshListener} to handle updates of the oauth2 tokens and the
  * {@link EventListener} to handle {@link EventDTO}s, that are received by the {@link LivisiWebSocket}.
- * <p/>
+ * <p>
  * The {@link DeviceDTO}s are organized by the {@link DeviceStructureManager}, which is also responsible for the
  * connection
  * to the LIVISI SmartHome webservice via the {@link LivisiClient}.

bundles/org.openhab.binding.livisismarthome/src/main/java/org/openhab/binding/livisismarthome/internal/listener/EventListener.java

@@ -40,7 +40,7 @@ public interface EventListener {
     void onError(Throwable cause);
 
     /**
-     * This method is called, when the evenRunner stops abnormally (statuscode <> 1000).
+     * This method is called, when the evenRunner stops abnormally ({@code statuscode <> 1000}).
      */
     void connectionClosed();
 }