diff --git a/lib/dmsf_zip.rb b/lib/dmsf_zip.rb
index 484c6bb3..fee69e17 100644
--- a/lib/dmsf_zip.rb
+++ b/lib/dmsf_zip.rb
@@ -1,76 +1,76 @@
-# Redmine plugin for Document Management System "Features"
-#
-# Copyright (C) 2011   Vít Jonáš <vit.jonas@gmail.com>
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-
-require 'zip/zip'
-require 'zip/zipfilesystem'
-require 'iconv'
-
-class DmsfZip
-
-  attr_reader :files
-
-  def initialize()
-    @zip = Tempfile.new(["dmsf_zip",".zip"])
-    @zip.chmod(0644)
-    @zip_file = Zip::ZipOutputStream.new(@zip.path)
-    @files = []
-  end
-
-  def finish
-    @zip_file.close unless @zip_file.nil?
-    @zip.path unless @zip.nil?
-  end
-
-  def close
-    @zip_file.close unless @zip_file.nil?
-    @zip.close unless @zip.nil?
-  end
-
-  def add_file(file, root_path = nil)
-    string_path = file.folder.nil? ? "" : file.folder.dmsf_path_str + "/"
-    string_path = string_path[(root_path.length + 1) .. string_path.length] if root_path
-    string_path += file.name
-    #TODO: somewhat ugly conversion problems handling bellow
-    begin
-      string_path = Iconv.conv(Setting.plugin_redmine_dmsf["dmsf_zip_encoding"], "utf-8", string_path)
-    rescue
-    end
-    @zip_file.put_next_entry(string_path)
-    File.open(file.last_revision.disk_file, "rb") do |f|
-      buffer = ""
-      while (buffer = f.read(8192))
-        @zip_file.write(buffer)
-      end
-    end
-    @files << file
-  end
-
-  def add_folder(folder, root_path = nil)
-    string_path = folder.dmsf_path_str + "/"
-    string_path = string_path[(root_path.length + 1) .. string_path.length] if root_path
-    #TODO: somewhat ugly conversion problems handling bellow
-    begin
-      string_path = Iconv.conv(Setting.plugin_redmine_dmsf["dmsf_zip_encoding"], "utf-8", string_path)
-    rescue
-    end
-    @zip_file.put_next_entry(string_path)
-    folder.subfolders.visible.each { |subfolder| self.add_folder(subfolder, root_path) }
-    folder.files.visible.each { |file| self.add_file(file, root_path) }
-  end
-
-end
+# Redmine plugin for Document Management System "Features"
+#
+# Copyright (C) 2011   Vít Jonáš <vit.jonas@gmail.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require 'zip/zip'
+require 'zip/zipfilesystem'
+require 'iconv'
+
+class DmsfZip
+
+  attr_reader :files
+
+  def initialize()
+    @zip = Tempfile.new(["dmsf_zip",".zip"])
+    @zip.chmod(0644)
+    @zip_file = Zip::ZipOutputStream.new(@zip.path)
+    @files = []
+  end
+
+  def finish
+    @zip_file.close unless @zip_file.nil?
+    @zip.path unless @zip.nil?
+  end
+
+  def close
+    @zip_file.close unless @zip_file.nil?
+    @zip.close unless @zip.nil?
+  end
+
+  def add_file(file, root_path = nil)
+    string_path = file.folder.nil? ? "" : file.folder.dmsf_path_str + "/"
+    string_path = string_path[(root_path.length + 1) .. string_path.length] if root_path
+    string_path += file.name
+    #TODO: somewhat ugly conversion problems handling bellow
+    begin
+      string_path = Iconv.conv(Setting.plugin_redmine_dmsf["dmsf_zip_encoding"], "utf-8", string_path)
+    rescue
+    end
+    @zip_file.put_next_entry(string_path)
+    File.open(file.last_revision.disk_file, "rb") do |f|
+      buffer = ""
+      while (buffer = f.read(8192))
+        @zip_file.write(buffer)
+      end
+    end
+    @files << file
+  end
+
+  def add_folder(folder, root_path = nil)
+    string_path = folder.dmsf_path_str + "/"
+    string_path = string_path[(root_path.length + 1) .. string_path.length] if root_path
+    #TODO: somewhat ugly conversion problems handling bellow
+    begin
+      string_path = Iconv.conv(Setting.plugin_redmine_dmsf["dmsf_zip_encoding"], "utf-8", string_path)
+    rescue
+    end
+    @zip_file.put_next_entry(string_path)
+    folder.subfolders.visible.each { |subfolder| self.add_folder(subfolder, root_path) }
+    folder.files.visible.each { |file| self.add_file(file, root_path) }
+  end
+
+end