diff --git a/api/.gitkeep b/api/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/rpc/core/desc/.gitkeep b/rpc/core/desc/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/rpc/core/ent/.gitkeep b/rpc/core/ent/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/rpc/file/.gitkeep b/rpc/file/.gitkeep
new file mode 100644
index 0000000..e69de29