Create a file with contents
        
        Usage: C{system.create_file(fileName, contents="")}
        
        @param fileName: full path to the file to be created
        @param contents: contents to insert into the file

def create_file(self, fileName, contents=""):
        """
        Create a file with contents
        
        Usage: C{system.create_file(fileName, contents="")}
        
        @param fileName: full path to the file to be created
        @param contents: contents to insert into the file
        """
        with open(fileName, "w") as written_file:
            written_file.write(contents)