private BugInstance createBug(String abbrev, String... designationUserPairs) {
assertTrue(designationUserPairs.length % 2 == 0);
BugInstance bug = new BugInstance(abbrev, 2);
bug.setInstanceHash(abbrev);
bug.addClass("edu.umd.Test" + abbrev);
List<BugDesignation> designations = new ArrayList<BugDesignation>();
for (int i = 0; i < designationUserPairs.length; i += 2) {
String designation = designationUserPairs[i];
String user = designationUserPairs[i + 1];
designations.add(new BugDesignation(designation, timestampCounter++, "my comment", user));