try {
            if (isImplicit != null) {
                final FTPSClient ftpsClient = new FTPSClient(isImplicit);
                if ("all".equals(trustManager)) {
                    ftpsClient.setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());
                } else if ("valid".equals(trustManager)) {
                    ftpsClient.setTrustManager(TrustManagerUtils.getValidateServerCertificateTrustManager());