private LinkRelevance createRandomLinkRelevance(URL link) {
        double relevance = randomGenerator.nextDouble();
        relevance = relevance + Double.MIN_VALUE; // avoids zero value
        return new LinkRelevance(link, relevance);
    }
Implements a random crawling policy in which each link gets a random relevance score.
ache/src/main/java/achecrawler/link/classifier/LinkClassifierRandom.java