generate main header per XML file

def generate_enums(basename, xml):
    '''generate main header per XML file'''
    directory = os.path.join(basename, '''enums''')
    mavparse.mkdir_p(directory)
    for en in xml.enum:
        f = open(os.path.join(directory, en.name+".java"), mode='w')
        t.write(f, '''
/* AUTO-GENERATED FILE.  DO NOT MODIFY.
 *
 * This class was automatically generated by the
 * java mavlink generator tool. It should not be modified by hand.
 */

package com.MAVLink.enums;

/** 
* ${description}
*/
public class ${name} {
${{entry:   public static final int ${name} = ${value}; /* ${description} |${{param:${description}| }} */
}}
}
            ''', en)
        f.close()