@@ -43,9 +43,8 @@
 /**
 * Thread-safe file implementation of a credential store.
 *
-* <p>For security purposes, the file's permissions are set to be accessible only by the file's
-* owner. Note that Java 1.5 does not support manipulating file permissions, and must be done
-* manually or using the JNI.
+* <p>For security purposes, the file's permissions are set such that the
+* file is only accessible by the file's owner.
 *
 * @since 1.16
 * @author Yaniv Inbar
@@ -136,26 +135,21 @@ public FileDataStoreFactory getDataStoreFactory() {
 * executed by the file's owner.
 *
 * @param file the file's permissions to modify
-* @throws IOException
+* @throws IOException if the permissions can't be set
 */
-static void setPermissionsToOwnerOnly(File file) throws IOException {
+private static void setPermissionsToOwnerOnly(File file) throws IOException {
 Set permissions = new HashSet<PosixFilePermission>();
 permissions.add(PosixFilePermission.OWNER_READ);
 permissions.add(PosixFilePermission.OWNER_WRITE);
 permissions.add(PosixFilePermission.OWNER_EXECUTE);
 try {
 Files.setPosixFilePermissions(Paths.get(file.getAbsolutePath()), permissions);
-} catch (UnsupportedOperationException exception) {
-LOGGER.warning("Unable to set permissions for " + file
-+ ", because you are running on a non-POSIX file system.");
-} catch (SecurityException exception) {
-// ignored
-} catch (IllegalArgumentException exception) {
-// ignored
+} catch (RuntimeException exception) {
+throw new IOException("Unable to set permissions for " + file, exception);
 }
 }
 
-static void setPermissionsToOwnerOnlyWindows(File file) throws IOException {
+private static void setPermissionsToOwnerOnlyWindows(File file) throws IOException {
 Path path = Paths.get(file.getAbsolutePath());
 FileOwnerAttributeView fileAttributeView = Files.getFileAttributeView(path, FileOwnerAttributeView.class);
 UserPrincipal owner = fileAttributeView.getOwner();
@@ -188,6 +182,11 @@ static void setPermissionsToOwnerOnlyWindows(File file) throws IOException {
 .build();
 
 // Overwrite the ACL with only this permission
-view.setAcl(ImmutableList.of(entry));
+try {
+view.setAcl(ImmutableList.of(entry));
+} catch (SecurityException ex) {
+throw new IOException("Unable to set permissions for " + file, ex);
+}
+
 }
 }