try {
    if (dataLocation != null && Files.exists(dataLocation)) {
        char[] password = getStorePassword(protectionParameter);
        try (InputStream fileStream = Files.newInputStream(dataLocation)) {
            if (useExternalStorage) {
                externalStorage.load(fileStream);
            } else {
                keyStore.load(fileStream, password);
            }
        }
        enumeration = keyStore.aliases();
    } else {
        keyStore.load(null, null);
        enumeration = Collections.emptyEnumeration();
    }
} catch (GeneralSecurityException e) {
    throw log.cannotInitializeCredentialStore(
            log.internalEncryptionProblem(e, dataLocation.toString()));
}