Add javadocs and specific interfaces for list

app/src/main/java/fr/free/nrw/commons/nearby/mvp/NearbyContract.java

@@ -1,6 +1,7 @@
 package fr.free.nrw.commons.nearby.mvp;
 
 public interface NearbyContract {
+
     interface View {
         void showPlaces();
     }
@@ -10,7 +11,8 @@ public interface NearbyContract {
         void uploadImageCamera();
         void bookmarkItem();
         void getDirections();
-        void openWikidata();
+        void seeWikidataItem();
+        void seeWikipediaArticle();
         void rotateScreen();
     }
 }

app/src/main/java/fr/free/nrw/commons/nearby/mvp/NearbyListContract.java

@@ -0,0 +1,19 @@
+package fr.free.nrw.commons.nearby.mvp;
+
+/**
+ * This interface defines specific View and UserActions for list
+ * part of the nearby. On the other hand both extends methods
+ * from parent View and UserActions where general methods are
+ * defined (in Nearby Contract)
+ */
+public interface NearbyListContract {
+
+    interface View extends NearbyContract.View {
+
+    }
+
+    interface UserActions extends NearbyContract.UserActions {
+        void openCommonsFilePage();
+        void expandItem();
+    }
+}

app/src/main/java/fr/free/nrw/commons/nearby/mvp/NearbyMapContract.java

@@ -1,6 +1,13 @@
 package fr.free.nrw.commons.nearby.mvp;
 
+/**
+ * This interface defines specific View and UserActions for map
+ * part of the nearby. On the other hand both extends methods
+ * from parent View and UserActions where general methods are
+ * defined (in Nearby Contract)
+ */
 public interface NearbyMapContract {
+
     interface View extends NearbyContract.View{
         void showSearchThisAreaButton();
         void showInformationBottomSheet();