diff --git a/history/005_letter_test/maven_clean.bat b/history/005_letter_test/maven_clean.bat
new file mode 100644
index 0000000..2f3d3e5
--- /dev/null
+++ b/history/005_letter_test/maven_clean.bat
@@ -0,0 +1 @@
+mvn clean
\ No newline at end of file