Index: stringprep-1.1/codegenerator/src/main/java/com/ongres/stringprep/codegenerator/GeneratorCode.java
===================================================================
--- stringprep-1.1.orig/codegenerator/src/main/java/com/ongres/stringprep/codegenerator/GeneratorCode.java
+++ stringprep-1.1/codegenerator/src/main/java/com/ongres/stringprep/codegenerator/GeneratorCode.java
@@ -62,8 +62,8 @@ public class GeneratorCode {
     ctx.put("parser", parser);
     String path = args[0] + "/com/ongres/stringprep/StringPrep.java";
     File file = new File(path);
-    if (!file.getParentFile().mkdirs()) {
-      throw new IOException("The directory couldn't be created");
+    if (!file.getParentFile().exists() && !file.getParentFile().mkdirs()) {
+      throw new IOException("The directory couldn't be created:" + file.getParentFile());
     }
     Writer writer = new OutputStreamWriter(new FileOutputStream(file),StandardCharsets.UTF_8);
     template.merge(ctx, writer);