diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..58efebe
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/*.rro
+/*.pdf
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..6964578
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "common"]
+	path = common
+	url = ssh://git@git.ram.eemcs.utwente.nl:20022/horlingsw/mac.git
diff --git a/common b/common
new file mode 160000
index 0000000..9824d62
--- /dev/null
+++ b/common
@@ -0,0 +1 @@
+Subproject commit 9824d626fd1bf2cdc4d03c4109500629ffe16a20