Only create the metatype directory if there are any metatype descriptors to write

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@573259 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/scrplugin/src/main/java/org/apache/felix/scrplugin/SCRDescriptorMojo.java b/scrplugin/src/main/java/org/apache/felix/scrplugin/SCRDescriptorMojo.java
index 85e8fa3..c50042a 100644
--- a/scrplugin/src/main/java/org/apache/felix/scrplugin/SCRDescriptorMojo.java
+++ b/scrplugin/src/main/java/org/apache/felix/scrplugin/SCRDescriptorMojo.java
@@ -187,8 +187,8 @@
 
         // create metatype information
         File mtFile = new File(this.outputDirectory, "OSGI-INF" + File.separator + "metatype" + File.separator + this.metaTypeName);
-        mtFile.getParentFile().mkdirs();
         if ( metaData.getDescriptors().size() > 0 ) {
+            mtFile.getParentFile().mkdirs();
             MetaTypeIO.write(metaData, mtFile);
         } else {
             if ( mtFile.exists() ) {