diff --git a/extensions/freebase/module/MOD-INF/.gitignore b/extensions/freebase/module/MOD-INF/.gitignore
new file mode 100644
index 000000000..840e7d312
--- /dev/null
+++ b/extensions/freebase/module/MOD-INF/.gitignore
@@ -0,0 +1 @@
+/classes/
diff --git a/extensions/gdata/module/MOD-INF/.gitignore b/extensions/gdata/module/MOD-INF/.gitignore
new file mode 100644
index 000000000..840e7d312
--- /dev/null
+++ b/extensions/gdata/module/MOD-INF/.gitignore
@@ -0,0 +1 @@
+/classes/
diff --git a/extensions/pc-axis/module/MOD-INF/.gitignore b/extensions/pc-axis/module/MOD-INF/.gitignore
new file mode 100644
index 000000000..840e7d312
--- /dev/null
+++ b/extensions/pc-axis/module/MOD-INF/.gitignore
@@ -0,0 +1 @@
+/classes/
diff --git a/extensions/sample/module/MOD-INF/.gitignore b/extensions/sample/module/MOD-INF/.gitignore
new file mode 100644
index 000000000..840e7d312
--- /dev/null
+++ b/extensions/sample/module/MOD-INF/.gitignore
@@ -0,0 +1 @@
+/classes/