SonarQube-induced minor refactoring

app/src/main/java/fr/s13d/photobackup/PBApplication.java

@@ -22,11 +22,13 @@
 import android.preference.PreferenceManager;
 
 import java.util.Map;
-import java.util.Set;
 
 import fr.s13d.photobackup.media.PBMediaStore;
 
 
+/**
+ * Application of the app
+ */
 public class PBApplication extends Application {
 
     private static final String LOG_TAG = "PBApplication";
@@ -52,11 +54,10 @@ public void onCreate() {
 
         if (BuildConfig.DEBUG) {
             Log.d(LOG_TAG, "Default SharedPreferences:");
-            Map<String, ?> allPrefs = PreferenceManager.getDefaultSharedPreferences(this).getAll();
-            Set<String> set = allPrefs.keySet();
-            for (String s : set) {
-                Log.d(LOG_TAG, s + "<" + allPrefs.get(s).getClass().getSimpleName() + "> =  "
-                        + allPrefs.get(s).toString());
+            final Map<String, ?> allPrefs = PreferenceManager.getDefaultSharedPreferences(this).getAll();
+            for (final Map.Entry<String, ?> entry : allPrefs.entrySet()) {
+                Log.d(LOG_TAG, entry.getKey() + "<" + entry.getValue().getClass().getSimpleName() + "> =  "
+                        + entry.getValue().toString());
             }
         }
     }

app/src/main/java/fr/s13d/photobackup/PBService.java

@@ -149,6 +149,7 @@ public void onSyncMediaStoreTaskPostExecute() {
     //////////////////////////////////////
     /**
      * Does nothing on receiving a message.
+     * @param message received message
      */
     public void onMessage(final String message) {
         // Do nothing

app/src/main/java/fr/s13d/photobackup/PBWifiBroadcastReceiver.java

@@ -32,6 +32,9 @@
 import fr.s13d.photobackup.media.PBMedia;
 
 
+/**
+ * Receives wifi broadcast intents and starts media upload if required.
+ */
 public class PBWifiBroadcastReceiver extends BroadcastReceiver {
     private static final String LOG_TAG = "PBWifiBroadcastReceiver";
     private static long lastFiredOn = 0;

app/src/main/java/fr/s13d/photobackup/media/PBMedia.java

@@ -27,13 +27,24 @@
 import fr.s13d.photobackup.Log;
 import fr.s13d.photobackup.PBApplication;
 
+
+/**
+ * Media object adding information over device medias.
+ */
 public class PBMedia implements Serializable {
     private final int id;
     private final String path;
     private final long dateAdded;
     private final SharedPreferences mediasPreferences;
     private String errorMessage;
     private PBMediaState state;
+
+    /**
+     * Enumeration of all possible media states
+     * - waiting: the media waits for being uploaded;
+     * - synced: the media is synced with the server already;
+     * - error: an error occurred.
+     */
     public enum PBMediaState { WAITING, SYNCED, ERROR }