1 files changed, 4 insertions, 0 deletions
diff --git a/juick-xmpp/src/main/java/com/juick/components/s2s/util/DialbackUtils.java b/juick-xmpp/src/main/java/com/juick/components/s2s/util/DialbackUtils.java
index 3bb786e5..980c2d6a 100644
--- a/juick-xmpp/src/main/java/com/juick/components/s2s/util/DialbackUtils.java
+++ b/juick-xmpp/src/main/java/com/juick/components/s2s/util/DialbackUtils.java
@@ -7,6 +7,10 @@ import org.apache.commons.codec.digest.HmacUtils;
  * Created by vitalyster on 05.12.2016.
  */
 public class DialbackUtils {
+    private DialbackUtils() {
+        throw new IllegalStateException();
+    }
+
     public static String generateDialbackKey(String secret, String to, String from, String id) {
         return HmacUtils.hmacSha256Hex(DigestUtils.sha256(secret),
                 (to + " " + from + " " + id).getBytes());