// -- Helper methods --
private String getMDBFile(String id) throws FormatException, IOException {
Location parentFile = new Location(id).getAbsoluteFile().getParentFile();
String[] fileList = parentFile.list();
for (int i=0; i<fileList.length; i++) {
if (fileList[i].startsWith(".")) continue;
if (checkSuffix(fileList[i], MDB_SUFFIX)) {
Location file =
new Location(parentFile, fileList[i]).getAbsoluteFile();