diff --git a/Algorithm/PathFinding/PathFinderInterface.php b/Algorithm/PathFinding/PathFinderInterface.php
index 8b1378917..bbf315b69 100644
--- a/Algorithm/PathFinding/PathFinderInterface.php
+++ b/Algorithm/PathFinding/PathFinderInterface.php
@@ -1 +1,9 @@
 
+interface PathFinderInterface {
+    public static function findPath(
+        int $startX, int $startY,
+        int $endX, int $endY, 
+        Grid $grid, 
+        int $heuristic, int $movement, 
+    ) : array;
+}