diff --git a/maven-plugin-tools-java/src/test/resources/source/package-info.java b/maven-plugin-tools-java/src/test/resources/source/package-info.java
new file mode 100644
index 0000000..6e282fb
--- /dev/null
+++ b/maven-plugin-tools-java/src/test/resources/source/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * Regression test for MPLUGIN-39.
+ */
+package source;