1 files changed, 3 insertions, 0 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/utils/FileUtils.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/utils/FileUtils.java
index b7d09cda2a..52009d20ef 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/utils/FileUtils.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/utils/FileUtils.java
@@ -1,6 +1,7 @@
 package com.mapbox.mapboxsdk.utils;
 
 import android.os.AsyncTask;
+import android.support.annotation.NonNull;
 
 import java.io.File;
 import java.lang.ref.WeakReference;
@@ -11,6 +12,7 @@ public class FileUtils {
    * Task checking whether app's process can read a file.
    */
   public static class CheckFileReadPermissionTask extends AsyncTask<File, Void, Boolean> {
+    @NonNull
     private final WeakReference<OnCheckFileReadPermissionListener> listenerWeakReference;
 
     public CheckFileReadPermissionTask(OnCheckFileReadPermissionListener listener) {
@@ -67,6 +69,7 @@ public class FileUtils {
    * Task checking whether app's process can write to a file.
    */
   public static class CheckFileWritePermissionTask extends AsyncTask<File, Void, Boolean> {
+    @NonNull
     private final WeakReference<OnCheckFileWritePermissionListener> listenerWeakReference;
 
     public CheckFileWritePermissionTask(OnCheckFileWritePermissionListener listener) {