diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2bbaca1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*~
+img/
+plantuml/
diff --git a/img/.keep b/img/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/plantuml/.keep b/plantuml/.keep
new file mode 100644
index 0000000..e69de29