document empty method bodies (codacy)

src/main/java/com/owncloud/android/authentication/AuthenticatorActivity.java

@@ -563,6 +563,7 @@ public class AuthenticatorActivity extends AccountAuthenticatorActivity
 
                 @Override
                 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                    // not used at the moment
                 }
 
                 @Override

src/main/java/com/owncloud/android/ui/CustomPopup.java

@@ -63,9 +63,11 @@ public class CustomPopup {
     }
 
     public void onCreate() {
+        // not used at the moment
     }
 
     public void onShow() {
+        // not used at the moment
     }
 
     public void preShow() {

src/main/java/com/owncloud/android/ui/activity/FolderPickerActivity.java

@@ -518,8 +518,6 @@ public class FolderPickerActivity extends FileActivity implements FileFragment.C
         }
     }
 
-    
-
     /**
      * Shows the information of the {@link OCFile} received as a
      * parameter in the second fragment.
@@ -528,7 +526,7 @@ public class FolderPickerActivity extends FileActivity implements FileFragment.C
      */
     @Override
     public void showDetails(OCFile file) {
-
+        // not used at the moment
     }
 
     /**
@@ -536,7 +534,7 @@ public class FolderPickerActivity extends FileActivity implements FileFragment.C
      */
     @Override
     public void onTransferStateChanged(OCFile file, boolean downloading, boolean uploading) {
-            
+        // not used at the moment
     }
 
     @Override

src/main/java/com/owncloud/android/ui/activity/ReceiveExternalFilesActivity.java

@@ -1137,10 +1137,14 @@ public class ReceiveExternalFilesActivity extends FileActivity
                 }
 
                 @Override
-                public void onNeutral(String callerTag) {}
+                public void onNeutral(String callerTag) {
+                    // not used at the moment
+                }
 
                 @Override
-                public void onCancel(String callerTag) {}
+                public void onCancel(String callerTag) {
+                    // not used at the moment
+                }
             }
         );
         errorDialog.show(getSupportFragmentManager(), FTAG_ERROR_FRAGMENT);

src/main/java/com/owncloud/android/ui/preview/PreviewImageActivity.java

@@ -358,6 +358,7 @@ public class PreviewImageActivity extends FileActivity implements
      */
     @Override
     public void onPageScrollStateChanged(int state) {
+        // not used at the moment
     }
 
     /**
@@ -367,15 +368,14 @@ public class PreviewImageActivity extends FileActivity implements
      * @param   position                Position index of the first page currently being displayed. 
      *                                  Page position+1 will be visible if positionOffset is
      *                                  nonzero.
-     *                                  
      * @param   positionOffset          Value from [0, 1) indicating the offset from the page
      *                                  at position.
      * @param   positionOffsetPixels    Value in pixels indicating the offset from position. 
      */
     @Override
     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+        // not used at the moment
     }
-    
 
     /**
      * Class waiting for broadcast events from the {@link FileDownloader} service.

src/main/java/com/owncloud/android/ui/preview/PreviewTextFragment.java

@@ -202,6 +202,7 @@ public class PreviewTextFragment extends FileFragment {
 
         @Override
         protected void onPreExecute() {
+            // not used at the moment
         }
 
         @Override

src/main/java/com/owncloud/android/utils/DialogMenuItem.java

@@ -191,7 +191,7 @@ public class DialogMenuItem implements MenuItem {
 
     @Override
     public void setShowAsAction(int actionEnum) {
-
+        // not used at the moment
     }
 
     @Override