Workaround for empty example document bug

Connection.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace devgroup\arangodb;
+
+use \triagens\ArangoDb\ConnectionOptions;
+
+class Connection extends \triagens\ArangoDb\Connection {
+    public function json_encode_wrapper($data, $options = null)
+    {
+        if ($this->getOption(ConnectionOptions::OPTION_CHECK_UTF8_CONFORM) === true) {
+            self::check_encoding($data);
+        }
+
+        
+        $response = json_encode($data, $options | JSON_FORCE_OBJECT);
+        
+        return $response;
+    }
+}