FilesystemImagePersistenceStrategy.init(): ignore PMD warning.

Correction for cc9466d commit.

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/service/FilesystemImagePersistenceStrategy.java

@@ -48,7 +48,7 @@ public FilesystemImagePersistenceStrategy(String storageDir) {
 	public void init() {
 		LOG.info("Images will be saved into {} directory", storageDir);
 
-		if (!storageDir.exists()) {
+		if (!storageDir.exists()) { // NOPMD: ConfusingTernary (it's ok for me)
 			LOG.warn("Directory '{}' doesn't exist! Image uploading won't work.", storageDir);
 
 		} else if (!storageDir.canWrite()) {