diff --git a/cmd/backend/files.go b/cmd/backend/files.go
new file mode 100644
index 0000000..2ccbb37
--- /dev/null
+++ b/cmd/backend/files.go
@@ -0,0 +1,28 @@
+package backend
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+func CopyFile(src, dst string) error {
+	srcFile, err := os.Open(src)
+	if err != nil {
+		return fmt.Errorf("error opening source file: %v", err)
+	}
+	defer srcFile.Close()
+
+	dstFile, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
+	if err != nil {
+		return fmt.Errorf("error opening destination file: %v", err)
+	}
+	defer dstFile.Close()
+
+	_, err = io.Copy(dstFile, srcFile)
+	if err != nil {
+		return fmt.Errorf("error copying file: %v", err)
+	}
+
+	return dstFile.Sync()
+}
diff --git a/cmd/frontend/articles.go b/cmd/frontend/articles.go
index 799d2c5..befb441 100644
--- a/cmd/frontend/articles.go
+++ b/cmd/frontend/articles.go
@@ -33,27 +33,6 @@ type EditorHTMLData struct {
 	Tags         []*b.Tag
 }
 
-func copyFile(src, dst string) error {
-	srcFile, err := os.Open(src)
-	if err != nil {
-		return fmt.Errorf("error opening source file: %v", err)
-	}
-	defer srcFile.Close()
-
-	dstFile, err := os.Create(dst)
-	if err != nil {
-		return fmt.Errorf("error opening destination file: %v", err)
-	}
-	defer dstFile.Close()
-
-	_, err = io.Copy(dstFile, srcFile)
-	if err != nil {
-		return fmt.Errorf("error copying file: %v", err)
-	}
-
-	return dstFile.Sync()
-}
-
 func WriteArticle(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		session, err := getSession(w, r, c, s)
@@ -61,14 +40,13 @@ func WriteArticle(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFunc {
 			return
 		}
 
-		data := new(EditorHTMLData)
+		data := &EditorHTMLData{Action: "submit"}
 
 		if session.Values["article"] == nil {
 			data = &EditorHTMLData{Article: new(b.Article)}
 		} else {
 			data = session.Values["article"].(*EditorHTMLData)
 		}
-		// data.Mode = EditMode
 
 		data.Tags, err = db.GetTagList()
 		if err != nil {
@@ -77,8 +55,6 @@ func WriteArticle(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFunc {
 			return
 		}
 
-		data.Action = "submit"
-
 		tmpl, err := template.ParseFiles(c.WebDir + "/templates/editor.html")
 		template.Must(tmpl, err).ExecuteTemplate(w, "page-content", data)
 	}
@@ -696,7 +672,7 @@ func AllowEditArticle(c *b.Config, db *b.DB, s *b.CookieStore) http.HandlerFunc
 			return
 		}
 
-		if err = copyFile(fmt.Sprint(c.ArticleDir, "/", oldID, ".md"), fmt.Sprint(c.ArticleDir, "/", newID, ".md")); err != nil {
+		if err = b.CopyFile(fmt.Sprint(c.ArticleDir, "/", oldID, ".md"), fmt.Sprint(c.ArticleDir, "/", newID, ".md")); err != nil {
 			log.Println(err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return