Add MapperInterface with a doctrine implementation

MapperInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace FOQ\ElasticaBundle;
+
+/**
+ * Maps Elastica documents with persisted objects
+ */
+interface MapperInterface
+{
+    /**
+     * Transforms an array of elastica objects into an array of
+     * model objects fetched from the doctrine repository
+     *
+     * @return array
+     **/
+    function fromElasticaObjects(array $elasticaObjects);
+}