diff --git a/er-diagram/er-diagram.drawio b/er-diagram/er-diagram.drawio
new file mode 100644
index 00000000..b025fbca
--- /dev/null
+++ b/er-diagram/er-diagram.drawio
@@ -0,0 +1 @@
+<mxGraphModel><root><mxCell id="0"/><mxCell id="1" parent="0"/></root></mxGraphModel>
\ No newline at end of file