fix coding style.

app/src/main/java/chat/rocket/android/layouthelper/chatroom/dialog/RoomUserAdapter.java

@@ -13,6 +13,7 @@ import chat.rocket.android.renderer.UserRenderer;
 import java.util.List;
 
 /**
+ * RecyclerView adapter for UsersOfRooms.
  */
 public class RoomUserAdapter extends RecyclerView.Adapter<RoomUserViewHolder> {
 
@@ -22,6 +23,9 @@ public class RoomUserAdapter extends RecyclerView.Adapter<RoomUserViewHolder> {
   private final String hostname;
   private List<String> usernames;
 
+  /**
+   * Constructor with required parameters.
+   */
   public RoomUserAdapter(Context context, RealmHelper realmHelper, String hostname) {
     this.context = context;
     this.inflater = LayoutInflater.from(context);

app/src/main/java/chat/rocket/android/layouthelper/chatroom/dialog/RoomUserViewHolder.java

@@ -14,6 +14,9 @@ public class RoomUserViewHolder extends RecyclerView.ViewHolder {
   ImageView avatar;
   TextView username;
 
+  /**
+   * Constructor.
+   */
   public RoomUserViewHolder(View itemView) {
     super(itemView);
     status = (ImageView) itemView.findViewById(R.id.room_user_status);

app/src/main/java/chat/rocket/android/service/observer/GetUsersOfRoomsProcedureObserver.java

@@ -14,8 +14,10 @@ import org.json.JSONObject;
 import timber.log.Timber;
 
 /**
+ * Model observer for executing getUsersOfRooms.
  */
-public class GetUsersOfRoomsProcedureObserver extends AbstractModelObserver<GetUsersOfRoomsProcedure> {
+public class GetUsersOfRoomsProcedureObserver
+    extends AbstractModelObserver<GetUsersOfRoomsProcedure> {
 
   private final MethodCallHelper methodCall;