}
// recursively remove thumbnail directories from sub directories
- for (final File subFile : workingDirectory.listFiles())
- if (subFile.isDirectory())
- removeIndex(subFile);
+ File[] files = workingDirectory.listFiles();
+ if (files != null)
+ for (final File subFile : files)
+ if (subFile.isDirectory())
+ removeIndex(subFile);
for (final Layout layout : Utils.getLayouts()) {
final File indexFile = Utils.getLayoutIndexFile(layout,