diff --git a/Configuration/Source/ContainerSource.php b/Configuration/Source/ContainerSource.php
index da77009..abcdf1b 100644
--- a/Configuration/Source/ContainerSource.php
+++ b/Configuration/Source/ContainerSource.php
@@ -40,19 +40,7 @@ class ContainerSource implements SourceInterface
     {
         $indexes = array();
         foreach ($this->configArray as $config) {
-            $types = array();
-
-            if (isset($config['types'])) {
-                foreach ($config['types'] as $typeConfig) {
-                    $types[$typeConfig['name']] = new TypeConfig(
-                        $typeConfig['name'],
-                        $typeConfig['mapping'],
-                        $typeConfig['config']
-                    );
-                    // TODO: handle prototypes..
-                }
-            }
-
+            $types = $this->getTypes($config);
             $index = new IndexConfig($config['name'], $types, array(
                 'elasticSearchName' => $config['elasticsearch_name'],
                 'settings' => $config['settings'],
@@ -64,4 +52,28 @@ class ContainerSource implements SourceInterface
 
         return $indexes;
     }
+
+    /**
+     * Builds TypeConfig objects for each type.
+     *
+     * @param array $config
+     * @return array
+     */
+    protected function getTypes($config)
+    {
+        $types = array();
+
+        if (isset($config['types'])) {
+            foreach ($config['types'] as $typeConfig) {
+                $types[$typeConfig['name']] = new TypeConfig(
+                    $typeConfig['name'],
+                    $typeConfig['mapping'],
+                    $typeConfig['config']
+                );
+                // TODO: handle prototypes..
+            }
+        }
+
+        return $types;
+    }
 }
diff --git a/Tests/Functional/app/Basic/config.yml b/Tests/Functional/app/Basic/config.yml
index ebd1ea0..3d0e120 100644
--- a/Tests/Functional/app/Basic/config.yml
+++ b/Tests/Functional/app/Basic/config.yml
@@ -92,3 +92,4 @@ fos_elastica:
                         identifier: "id"
                 null_mappings:
                     mappings: ~
+        empty_index: ~