diff --git a/maidroid_tool/core_writer.lua b/maidroid_tool/core_writer.lua
new file mode 100644
index 0000000..1edf151
--- /dev/null
+++ b/maidroid_tool/core_writer.lua
@@ -0,0 +1,11 @@
+------------------------------------------------------------
+-- Copyright (c) 2016 tacigar. All rights reserved.
+-- https://github.com/tacigar/maidroid
+------------------------------------------------------------
+
+-- register a definition of a core writer.
+minetest.register_node("maidroid_tool:core_writer", {
+	drawtype        = "nodebox",
+	tiles           = {},
+
+})