diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..424813d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+build/
+src/de/unibremen/informatik/hets/grammar/HetCASLGrammar.jj
+src/de/unibremen/informatik/hets/grammar/*.java
+.*.swp