There's a giant mix brewing between "old" code, bad code and not implemented exceptions. I suspect the next change will be to cut out all old stuff, throw a lot of NotImplementedExceptions and get going.

app/lib/FireflyIII/Database/Ifaces/RecurringTransactionInterface.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace FireflyIII\Database\Ifaces;
+
+use Illuminate\Support\Collection;
+
+/**
+ * Interface AccountInterface
+ *
+ * @package FireflyIII\Database
+ */
+interface RecurringTransactionInterface
+{
+}