Fixed attribute hiding and removed database connection close

According to this post by a Google engineer (http://groups.google.com/group/android-developers/msg/74ee967b2fcff770), there's nothing wrong with leaving the database connection open

omniNotes/src/main/java/it/feio/android/omninotes/db/DbHelper.java

@@ -199,7 +199,7 @@ public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
 
     public Note updateNote(Note note, boolean updateLastModification) {
-        SQLiteDatabase db = getDatabase(true);
+	    db = getDatabase(true);
 
         String content = note.isLocked()
                 ? Security.encrypt(note.getContent(), prefs.getString(Constants.PREF_PASSWORD, ""))
@@ -246,7 +246,6 @@ public Note updateNote(Note note, boolean updateLastModification) {
 
         db.setTransactionSuccessful();
         db.endTransaction();
-		db.close();
 
         // Fill the note with correct data before returning it
         note.setCreation(note.getCreation() > 0 ? note.getCreation() : values.getAsLong(KEY_CREATION));