Lots of new code for new importer routine.

app/Support/Import/Configuration/ConfigurationInterface.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * ConfigurationInterface.php
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ * This software may be modified and distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\Import\Configuration;
+
+use FireflyIII\Models\ImportJob;
+
+/**
+ * Class ConfigurationInterface
+ *
+ * @package FireflyIII\Support\Import\Configuration
+ */
+interface ConfigurationInterface
+{
+    /**
+     * ConfigurationInterface constructor.
+     *
+     * @param ImportJob $job
+     */
+    public function __construct(ImportJob $job);
+
+    /**
+     * Get the data necessary to show the configuration screen.
+     *
+     * @return array
+     */
+    public function getData(): array;
+
+    /**
+     * Store the result.
+     *
+     * @param array $data
+     *
+     * @return bool
+     */
+    public function storeConfiguration(array $data): bool;
+
+}