Enable MissingJavadocPackage and UnnecessaryParentheses checkstyle checks

smack-im/src/main/java/org/jivesoftware/smack/chat/ChatManager.java

@@ -103,7 +103,7 @@ public final class ChatManager extends Manager{
          * Will attempt to match on the JID in the from field, and then attempt the base JID if no match was found.
          * This is the most lenient matching.
          */
-        BARE_JID;
+        BARE_JID,
     }
 
     private final StanzaFilter packetFilter = new OrFilter(MessageTypeFilter.CHAT, new FlexibleStanzaTypeFilter<Message>() {

smack-im/src/main/java/org/jivesoftware/smack/roster/Roster.java

@@ -1570,7 +1570,7 @@ public final class Roster extends Manager {
                         else {
                             fullFrom = from.asFullJidIfPossible();
                             // We know that this must be a full JID in this case.
-                            assert (fullFrom != null);
+                            assert fullFrom != null;
                         }
                     }
                     Map<Resourcepart, Presence> userPresences;

smack-im/src/main/java/org/jivesoftware/smack/roster/RosterEntry.java

@@ -123,7 +123,7 @@ public final class RosterEntry extends Manager {
      * @param item new item
      */
     void updateItem(RosterPacket.Item item) {
-        assert (item != null);
+        assert item != null;
         this.item = item;
     }
 

smack-im/src/main/java/org/jivesoftware/smack/roster/provider/RosterPacketProvider.java

@@ -113,7 +113,7 @@ public class RosterPacketProvider extends IQProvider<RosterPacket> {
             }
         }
         ParserUtils.assertAtEndTag(parser);
-        assert (item != null);
+        assert item != null;
         return item;
     }
 }