Rename of exception class Disconnectied. Add comment.

app/src/main/java/chat/rocket/android/service/RealmBasedConnectivityManager.java

@@ -191,7 +191,7 @@ import rx.subjects.PublishSubject;
         .flatMap(state ->
             state == ServerConnectivity.STATE_CONNECTED
                 ? Single.just(true)
-                : Single.error(new ServerConnectivity.Disconnected()));
+                : Single.error(new ServerConnectivity.DisconnectedException()));
   }
 
   private Single<Boolean> waitForDisconnected(String hostname) {

app/src/main/java/chat/rocket/android/service/ServerConnectivity.java

@@ -17,8 +17,11 @@ public class ServerConnectivity {
     this.state = state;
   }
 
-  public static class Disconnected extends Exception {
-    public Disconnected() {
+  /**
+   * This exception should be thrown when connection is lost during waiting for CONNECTED.
+   */
+  public static class DisconnectedException extends Exception {
+    public DisconnectedException() {
       super("Disconnected");
     }
   }