diff --git a/src/main/java/util/Strategy.java b/src/main/java/util/Strategy.java
new file mode 100644
index 0000000000000000000000000000000000000000..c3b6708ec30b9ac7143477346454fedddfb5c3b9
--- /dev/null
+++ b/src/main/java/util/Strategy.java
@@ -0,0 +1,4 @@
+package util;
+
+public interface Strategy {
+}