diff --git a/bin/.gitkeep b/bin/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/data/.gitignore b/data/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..5e7d2734cfc60289debf74293817c0a8f572ff32
--- /dev/null
+++ b/data/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore
diff --git a/doc/.gitkeep b/doc/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/results/.gitignore b/results/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..5e7d2734cfc60289debf74293817c0a8f572ff32
--- /dev/null
+++ b/results/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore
diff --git a/src/.gitkeep b/src/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391