diff --git a/app/src/main/java/fr/free/nrw/commons/category/CategorizationFragment.java b/app/src/main/java/fr/free/nrw/commons/category/CategorizationFragment.java
index 0973bcf48..a52031646 100644
--- a/app/src/main/java/fr/free/nrw/commons/category/CategorizationFragment.java
+++ b/app/src/main/java/fr/free/nrw/commons/category/CategorizationFragment.java
@@ -49,8 +49,8 @@ import fr.free.nrw.commons.upload.MwVolleyApi;
  * Displays the category suggestion and selection screen. Category search is initiated here.
  */
 public class CategorizationFragment extends Fragment {
-    public static interface OnCategoriesSaveHandler {
-        public void onCategoriesSave(ArrayList<String> categories);
+    public interface OnCategoriesSaveHandler {
+        void onCategoriesSave(ArrayList<String> categories);
     }
 
     ListView categoriesList;
diff --git a/app/src/main/java/fr/free/nrw/commons/media/MediaDetailPagerFragment.java b/app/src/main/java/fr/free/nrw/commons/media/MediaDetailPagerFragment.java
index 97c5981d8..16aacd4c2 100644
--- a/app/src/main/java/fr/free/nrw/commons/media/MediaDetailPagerFragment.java
+++ b/app/src/main/java/fr/free/nrw/commons/media/MediaDetailPagerFragment.java
@@ -46,11 +46,11 @@ public class MediaDetailPagerFragment extends Fragment implements ViewPager.OnPa
     }
 
     public interface MediaDetailProvider {
-        public Media getMediaAtPosition(int i);
-        public int getTotalMediaCount();
-        public void notifyDatasetChanged();
-        public void registerDataSetObserver(DataSetObserver observer);
-        public void unregisterDataSetObserver(DataSetObserver observer);
+        Media getMediaAtPosition(int i);
+        int getTotalMediaCount();
+        void notifyDatasetChanged();
+        void registerDataSetObserver(DataSetObserver observer);
+        void unregisterDataSetObserver(DataSetObserver observer);
     }
 
     //FragmentStatePagerAdapter allows user to swipe across collection of images (no. of images undetermined)
diff --git a/app/src/main/java/fr/free/nrw/commons/upload/MultipleUploadListFragment.java b/app/src/main/java/fr/free/nrw/commons/upload/MultipleUploadListFragment.java
index 0aa2d285f..f9627adc5 100644
--- a/app/src/main/java/fr/free/nrw/commons/upload/MultipleUploadListFragment.java
+++ b/app/src/main/java/fr/free/nrw/commons/upload/MultipleUploadListFragment.java
@@ -36,7 +36,7 @@ import fr.free.nrw.commons.media.MediaDetailPagerFragment;
 public class MultipleUploadListFragment extends Fragment {
 
     public interface OnMultipleUploadInitiatedHandler {
-        public void OnMultipleUploadInitiated();
+        void OnMultipleUploadInitiated();
     }
 
     private GridView photosGrid;