created bogus empty java files for examples, so that javadoc artifact is created, and build is not rejected by maven central!
(cherry-picked from master)
diff --git a/examples/global-web-fabric/src/main/java/brooklyn/demo/ReadMe.java b/examples/global-web-fabric/src/main/java/brooklyn/demo/ReadMe.java
new file mode 100644
index 0000000..e3bd5ae
--- /dev/null
+++ b/examples/global-web-fabric/src/main/java/brooklyn/demo/ReadMe.java
@@ -0,0 +1,10 @@
+package brooklyn.demo;
+
+public class ReadMe {
+
+/* This class exists only so that javadoc is generated and artifacts can be staged at sonatype for deployment to maven central.
+ * See: https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide
+ *
+ * (The actual examples are in other classes in this package / project.) */
+
+}
diff --git a/examples/hadoop-and-whirr/src/main/java/brooklyn/extras/whirr/ReadMe.java b/examples/hadoop-and-whirr/src/main/java/brooklyn/extras/whirr/ReadMe.java
new file mode 100644
index 0000000..3f342f8
--- /dev/null
+++ b/examples/hadoop-and-whirr/src/main/java/brooklyn/extras/whirr/ReadMe.java
@@ -0,0 +1,10 @@
+package brooklyn.extras.whirr;
+
+public class ReadMe {
+
+/* This class exists only so that javadoc is generated and artifacts can be staged at sonatype for deployment to maven central.
+ * See: https://docs.sonatype.org/display/Repository/Sonatype+OSS+Maven+Repository+Usage+Guide
+ *
+ * (The actual examples are in other classes in this package / project.) */
+
+}
