The HelloWorld example OWS does not build

Having a HelloWorld example is of course done to introduce new developers with something simple that works, without them having to understand all the internals yet.

The HelloWorld example at http://docs.geoserver.org/latest/en/developer/programming-guide/ows-services/implementing.html will not build.

Creating the example as shown on that page results in the following build error:
Could not find artifact org.eclipse.emf:common:jar:2.6.0 in boundless (http://repo.boundlessgeo.com/main)

The error can apparently be fixed by making this change to pom.xml:
<name>Boundless Maven Repository</name>
<!--BAD URL AS SHOWN IN EXAMPLE <url>http://repo.boundlessgeo.com/main</url>-
Use this instead-->
<url>https://boundless.artifactoryonline.com/boundless/snapshot/</url>