}
private File createFile(String id) throws IOException {
final File file = new File(sourceFolder.getRoot(), id + ".exec");
final FileOutputStream out = new FileOutputStream(file);
final ExecutionDataWriter writer = new ExecutionDataWriter(out);
final int value = id.length();
writer.visitClassExecution(new ExecutionData(value, id, new boolean[0]));
writer.visitSessionInfo(new SessionInfo(id, value, value));
out.close();
return file;
}