public File copy(File source) throws IOException 
{
        FileChannel in = null;
        FileChannel out = null;
        File dest = new File(outputDirectory.getAbsolutePath() + File.separator + "activemq.xml");
        try {
            in = new FileInputStream(source).getChannel();
            out = new FileOutputStream(dest).getChannel();
            long size = in.size();
            MappedByteBuffer buf = in.map(FileChannel.MapMode.READ_ONLY, 0, size);
            out.write(buf);
        } finally {
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
        }
        return dest;
}

Copy activemq configuration file to output directory.

 public  void execute() throws MojoExecutionException 
{
        File out = outputDirectory;
        // Create output directory if it doesn't exist.
        if (!out.exists()) {
            out.mkdirs();
        }
        String[] args = new String[2];
        if (url != null) {
            args[0] = "start";
            args[1] = url;
        } else {
            File config;
            if (configFile != null) {
                config = configFile;
            } else {
                config = new File(configDirectory + File.separator + configType + ".xml");
            }
            try {
                config = copy(config);
            } catch (IOException e) {
                throw new MojoExecutionException(e.getMessage());
            }
            args[0] = "start";
            args[1] = "xbean:" + (config.toURI()).toString();
        }
        Main.main(args);
}