[android] Add Javadoc for offline package

Fixes #4295

1 files changed, 28 insertions, 3 deletions

diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineManager.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineManager.java
index 8ddc68c86f..85b3d619b8 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineManager.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/offline/OfflineManager.java
@@ -43,17 +43,42 @@ public class OfflineManager {
     // This object is implemented as a singleton
     private static OfflineManager instance;
 
-    /*
-     * Callbacks
+    /**
+     * This callback receives an asynchronous response containing a list of all
+     * {@link OfflineRegion} in the database, or an error message otherwise.
      */
-
     public interface ListOfflineRegionsCallback {
+        /**
+         * Receives the list of offline regions
+         *
+         * @param offlineRegions
+         */
         void onList(OfflineRegion[] offlineRegions);
+
+        /**
+         * Receives the error message
+         *
+         * @param error
+         */
         void onError(String error);
     }
 
+    /**
+     * This callback receives an asynchronous response containing the newly created
+     * {@link OfflineRegion} in the database, or an error message otherwise.
+     */
     public interface CreateOfflineRegionCallback {
+        /**
+         * Receives the newly created offline region
+         * @param offlineRegion
+         */
         void onCreate(OfflineRegion offlineRegion);
+
+        /**
+         * Receives the error message
+         *
+         * @param error
+         */
         void onError(String error);
     }