1 files changed, 8 insertions, 7 deletions
diff --git a/app/src/main/java/com/wireguard/android/fragment/BaseFragment.java b/app/src/main/java/com/wireguard/android/fragment/BaseFragment.java
index e1d4c87b..f4c6ea81 100644
--- a/app/src/main/java/com/wireguard/android/fragment/BaseFragment.java
+++ b/app/src/main/java/com/wireguard/android/fragment/BaseFragment.java
@@ -10,7 +10,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.databinding.DataBindingUtil;
 import android.databinding.ViewDataBinding;
-import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.design.widget.Snackbar;
 import android.support.v4.app.Fragment;
 import android.util.Log;
@@ -37,10 +37,11 @@ public abstract class BaseFragment extends Fragment implements OnSelectedTunnelC
     private static final String TAG = "WireGuard/" + BaseFragment.class.getSimpleName();
     private static final int REQUEST_CODE_VPN_PERMISSION = 23491;
 
-    private BaseActivity activity;
-    private Tunnel pendingTunnel;
-    private Boolean pendingTunnelUp;
+    @Nullable private BaseActivity activity;
+    @Nullable private Tunnel pendingTunnel;
+    @Nullable private Boolean pendingTunnelUp;
 
+    @Nullable
     protected Tunnel getSelectedTunnel() {
         return activity != null ? activity.getSelectedTunnel() : null;
     }
@@ -65,7 +66,7 @@ public abstract class BaseFragment extends Fragment implements OnSelectedTunnelC
     }
 
     @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+    public void onActivityResult(final int requestCode, final int resultCode, @Nullable final Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
 
         if (requestCode == REQUEST_CODE_VPN_PERMISSION) {
@@ -76,7 +77,7 @@ public abstract class BaseFragment extends Fragment implements OnSelectedTunnelC
         }
     }
 
-    protected void setSelectedTunnel(final Tunnel tunnel) {
+    protected void setSelectedTunnel(@Nullable final Tunnel tunnel) {
         if (activity != null)
             activity.setSelectedTunnel(tunnel);
     }
@@ -106,7 +107,7 @@ public abstract class BaseFragment extends Fragment implements OnSelectedTunnelC
         });
     }
 
-    private void setTunnelStateWithPermissionsResult(@NonNull final Tunnel tunnel, final boolean checked) {
+    private void setTunnelStateWithPermissionsResult(final Tunnel tunnel, final boolean checked) {
         tunnel.setState(State.of(checked)).whenComplete((state, throwable) -> {
             if (throwable == null)
                 return;