old_contents: '''
  Created on 2013.09.07.
  
  @author: Laca
  '''
  
  class LogMessage(object):
      '''
      classdocs
      '''
      
      def __init__(self, nodeId, dateTimeInMillis):
          self.nodeId = nodeId
          self.dateTimeInMillis = dateTimeInMillis
          self.data = []
new_contents: '''
  Created on 2013.09.07.
  '''
  
  class LogMessage(object):
      '''
      classdocs
      '''
      
      def __init__(self, nodeId, dateTimeInMillis):
          self.nodeId = nodeId
          self.dateTimeInMillis = dateTimeInMillis
          self.data = []
  
subject: Update log_message.py