For Elasticsearch < 2.0, see the https://github.com/elastic/found-shield-example/tree/1.x branch
To run the example use mvn exec:java:
$ mvn compile exec:java -Dhost=YOUR_CLUSTER_ID.REGION.aws.found.io -Dshield.user="username:password"
Replace YOUR_CLUSTER_ID with your cluster id and REGION with the region the cluster is started in.