diff --git a/src/main/java/PingPong/CollisionChecker.java b/src/main/java/PingPong/CollisionChecker.java
new file mode 100644
index 0000000..6543814
--- /dev/null
+++ b/src/main/java/PingPong/CollisionChecker.java
@@ -0,0 +1,7 @@
+package PingPong;
+
+public class CollisionChecker {
+    public Boolean didTouchTopOrBottomEdge(Integer ballYCoordinate, Integer maxHeight) {
+        return ballYCoordinate <= 0 || ballYCoordinate >= maxHeight;
+    }
+}