Going namespaced, going scenario style

app/code/backup/Factory.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Shikiryu\Backup\Backup;
+
+class Factory
+{
+    /**
+     * @param array $config
+     * @return BackupAbstract
+     */
+    public static function build(array $config)
+    {
+        $class = array_keys($config)[0];
+        if (class_exists($class)) {
+            /* @var $instance BackupAbstract */
+            return new $class(array_values($config));
+        }
+        return null;
+    }
+}