FileSnapshot: fix warnings

- comment empty code block
- suppress non-translatable text warning

Change-Id: Id49b4a56bbe5454edfe1ea8b79ceeaf51ceac370

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileSnapshot.java

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileSnapshot.java b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileSnapshot.java
index d752e31..7f34aed 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileSnapshot.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/FileSnapshot.java
@@ -589,9 +589,10 @@ private static BasicFileAttributes getFileAttributes(File path) throws NoSuchEle
 				}
 			}
 		} catch (NoSuchFileException e) {
+			// ignore
 		} catch (FileSystemException e) {
 			String msg = e.getMessage();
-			if (!msg.endsWith("Not a directory")) {
+			if (!msg.endsWith("Not a directory")) { //$NON-NLS-1$
 				LOG.error(msg, e);
 			}
 		} catch (IOException e) {