Error Handling in Directory Creation

[DeHopen]

@yegor256

In CheckstyleValidator.configuration():

if (!parent.exists() && !parent.mkdirs()) { throw new IllegalStateException( String.format( "Unable to create directories needed for %s", cache.getPath() ) ); }

• Problem: If parent.exists() returns true but the directory is not actually writable, this will not be caught.

• Consequence: Later file operations may fail.

• Fix: Consider checking for writability as well.