reads some Information from Manifest File and returns them as String

BuildInfoBuilder.java

import java.io.InputStream;
import java.net.URL;
import java.util.Collections;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

public class BuildInfoBuilder {

    public static String buildInfo() {
        try {
            for (URL url : Collections.list(Thread.currentThread().getContextClassLoader().getResources(JarFile.MANIFEST_NAME))) {
                try (InputStream is = url.openStream()) {
                    Manifest manifest = new Manifest(is);
                    Attributes mainAttribs = manifest.getMainAttributes();
                    String user = mainAttribs.getValue("Build-User");
                    String version = mainAttribs.getValue("Build-Label");
                    String time = mainAttribs.getValue("Build-Time");
                    if (user != null || version != null || time != null) {
                        return user + " made " + version + " @ " + time;
                    }
                }
            }
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        return "no Info";
    }
}