Thanks to everybody who answered. However, I'm utterly confused. The references to the examples (https://github.com/GoogleCloudPlatform/cloud-opensource-java/tree/master/dependencies and https://github.com/apache/maven-resolver/tree/master/maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples) effectively all use org.eclipse.aether (e.g. https://github.com/apache/maven-resolver/blob/master/maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples/ResolveArtifact.java doesn't use a single class from org.apache.maven.*).
It somehow makes me wonder what the point of the org.apache.maven.* API is. I was under the impression that it is "the way to go" when you want to make use of an existing, maven-project-supported library for working with maven repositories and artifacts. But now I'm left with the impression that nobody really uses it and I shouldn't care about it and rather use org.eclipse.aether. Is this correct? - Michael