added nullable indicator, as suggested by @juherr

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/java/org/testng/internal/Utils.java b/src/main/java/org/testng/internal/Utils.java
index 72ec7ff2..bd97baf8 100644
--- a/src/main/java/org/testng/internal/Utils.java
+++ b/src/main/java/org/testng/internal/Utils.java
@@ -100,7 +100,7 @@ public final class Utils {
     return vResult.toArray(new String[vResult.size()]);
   }
 
-  public static void writeUtf8File(String outputDir, String fileName, XMLStringBuffer xsb, String prefix) {
+  public static void writeUtf8File(@Nullable String outputDir, String fileName, XMLStringBuffer xsb, String prefix) {
     try {
       final File outDir = (outputDir != null) ? new File(outputDir) : new File("").getAbsoluteFile();
       if (!outDir.exists()) {
@@ -794,7 +794,7 @@ public final class Utils {
   /**
    * Returns the string representation of the specified object, transparently
    * handling null references and arrays.
-   * 
+   *
    * @param obj
    *            the object
    * @return the string representation