Remapped all library classes.

app/lib/FireflyIII/Database/Budget/BudgetInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace FireflyIII\Database\Budget;
+
+use Carbon\Carbon;
+use Illuminate\Support\Collection;
+
+/**
+ * Interface BudgetInterface
+ *
+ * @package FireflyIII\Database
+ */
+interface BudgetInterface
+{
+    /**
+     * @param \Budget $budget
+     * @param Carbon  $date
+     *
+     * @return \LimitRepetition|null
+     */
+    public function repetitionOnStartingOnDate(\Budget $budget, Carbon $date);
+
+    /**
+     * @param Carbon $start
+     * @param Carbon $end
+     *
+     * @return Collection
+     */
+    public function transactionsWithoutBudgetInDateRange(Carbon $start, Carbon $end);
+
+}