Half-way through with some cleaning up.

app/lib/FireflyIII/FF3ServiceProvider.php

@@ -0,0 +1,28 @@
+<?php
+namespace FireflyIII;
+
+use Illuminate\Support\ServiceProvider;
+
+/**
+ * Class FF3ServiceProvider
+ *
+ * @package FireflyIII
+ */
+class FF3ServiceProvider extends ServiceProvider
+{
+
+
+    /**
+     * Triggered automatically by Laravel
+     */
+    public function register()
+    {
+        // FORMAT:
+        #$this->app->bind('Interface', 'Class');
+
+        // preferences:
+        $this->app->bind('FireflyIII\Shared\Preferences\PreferencesInterface', 'FireflyIII\Shared\Preferences\Preferences');
+
+    }
+
+}