diff --git a/client/src/main/java/ctbrec/ui/tabs/SiteTabPane.java b/client/src/main/java/ctbrec/ui/tabs/SiteTabPane.java
index 32d337e3..e8a491d1 100644
--- a/client/src/main/java/ctbrec/ui/tabs/SiteTabPane.java
+++ b/client/src/main/java/ctbrec/ui/tabs/SiteTabPane.java
@@ -3,7 +3,6 @@ package ctbrec.ui.tabs;
 import ctbrec.sites.Site;
 import ctbrec.ui.SiteUiFactory;
 import javafx.beans.value.ChangeListener;
-import javafx.beans.value.ObservableValue;
 import javafx.geometry.Side;
 import javafx.scene.Scene;
 import javafx.scene.control.Tab;
@@ -21,15 +20,12 @@ public class SiteTabPane extends TabPane {
         }
 
         // register changelistener to activate / deactivate tabs, when the user switches between them
-        getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {
-            @Override
-            public void changed(ObservableValue<? extends Tab> ov, Tab from, Tab to) {
-                if (from != null && from instanceof TabSelectionListener) {
-                    ((TabSelectionListener) from).deselected();
-                }
-                if (to != null && to instanceof TabSelectionListener) {
-                    ((TabSelectionListener) to).selected();
-                }
+        getSelectionModel().selectedItemProperty().addListener((ChangeListener<Tab>) (ov, from, to) -> {
+            if (from instanceof TabSelectionListener) {
+                ((TabSelectionListener) from).deselected();
+            }
+            if (to instanceof TabSelectionListener) {
+                ((TabSelectionListener) to).selected();
             }
         });
     }