This Python script will check a file (or all files in a directory tree) to verify that it/they contain well-formed XML.

xmlchecker.py

import os
import string
import sys
from xml.dom.minidom import parse, parseString
 
def CheckFile(fileName):
	try:
		dom1 = parse(fileName)
 
		if sys.argv[1] != '-rq':
			print fileName + ' is OK'
 
	except Exception as ex:
		print fileName + ': ' + str(ex)
 
def RecursiveCheck():
	for root, subFolders, files in os.walk('.'): 
		for file in files: 
			fullFileName = os.path.join(root,file)
			fileName,fileExt = os.path.splitext(fullFileName)
			if fileExt == '.xml' or fileExt == '.config' or fileExt == '.build':
				CheckFile(fullFileName)
 
def UsageMessage():
	print '\nUsage:\n'
	print '\tSingle file:'
	print '\t\tconfigchecker.py <inputfile.xml>'
	print '\n'
	print '\tRecursive, verbose:'
	print '\t\tconfigchecker.py -r'
	print '\n'
	print '\tRecursive, reporting only errors:'
	print '\t\tconfigchecker.py -rq'
 
 
### MAIN starts here ###
 
if len(sys.argv) != 2:
	UsageMessage()
	sys.exit(1)
 
print '\n'
 
if sys.argv[1] == '-r' or sys.argv[1] == '-rq':
	RecursiveCheck()
else:
	CheckFile(sys.argv[1])