* @param ownTmpDir the temporary directory to delete
     */
    protected void deleteTempDir(final File ownTmpDir) {
        if (ownTmpDir == null) {
            return;
        }
        if (!FileUtils.deleteQuietly(ownTmpDir)) {
            logger.warn("Could not delete a temp dir: {}", ownTmpDir.getAbsolutePath());
        }
    }

    /**
     * Appends JAR files from the specified directory to the classpath buffer.

            public LaJobRuntime getJobRuntime() {
                return null;
            }
        }, "jobHelper");
    }

    @Override
    public void tearDown() throws Exception {
        FileUtils.deleteQuietly(tempDir);

        // Restore original helpers
        if (originalSystemHelper != null) {
            ComponentUtil.register(originalSystemHelper, "systemHelper");
        }