diff --git a/lib/github_changelog_generator/parser_file.rb b/lib/github_changelog_generator/parser_file.rb
index 0fc58e9..da50af1 100644
--- a/lib/github_changelog_generator/parser_file.rb
+++ b/lib/github_changelog_generator/parser_file.rb
@@ -6,8 +6,6 @@ module GitHubChangelogGenerator
   class ParserFile
     FILENAME = ".github_changelog_generator"
 
-    attr_reader :file
-
     # @param options [Hash]
     # @param file [nil,IO]
     def initialize(options, file = read_default_file)
@@ -22,9 +20,9 @@ module GitHubChangelogGenerator
 
     # Set @options using configuration file lines.
     def parse!
-      return unless file
-      file.each_line { |line| parse_line!(line) }
-      file.close
+      return unless @file
+      @file.each_line { |line| parse_line!(line) }
+      @file.close
     end
 
     private
@@ -33,7 +31,7 @@ module GitHubChangelogGenerator
       option_name, value = extract_pair(line)
       @options[option_key_for(option_name)] = convert_value(value, option_name)
     rescue
-      raise ParserError, "Config file #{file} is incorrect in line \"#{line.gsub(/[\n\r]+/, '')}\""
+      raise ParserError, "Config file problem on line \"#{line.gsub(/[\n\r]+/, '')}\""
     end
 
     # Returns a the option name as a symbol and its string value sans newlines.