diff --git a/README.md b/README.md
index 062051b..4cd4129 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
 # vim-split-open
+
+This is my first vim plugin. It provides a command to open a combination of c++ source and header file in a new tab split side-by-side.
diff --git a/plugin/split-open.vim b/plugin/split-open.vim
new file mode 100644
index 0000000..43992db
--- /dev/null
+++ b/plugin/split-open.vim
@@ -0,0 +1,13 @@
+function! SplitOpenFile(filename)
+	execute("tabedit " . a:filename)
+	let l:file_extension = tolower(fnamemodify(a:filename, ":e"))
+	if l:file_extension == "cpp"
+		execute("FSSplitLeft")
+		execute("wincmd l")
+	elseif l:file_extension == "h"
+		execute("FSSplitRight")
+		execute("wincmd h")
+	endif
+endfunction
+
+command! -nargs=1 SplitOpen :call SplitOpenFile("<args>")