diff --git a/README.md b/README.md
index bbeebcb..6ef6f4c 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,17 @@
 
 # nginx config file formatter
 
-Formats *nginx* configuration files.
\ No newline at end of file
+Formats *nginx* configuration files.
+
+## Installation
+
+Requirements: Python 3+.
+
+## Usage
+
+* todo command line args
+* you can pass several files in command line
+
+## Credits
+
+Copyright 2016 Michał Słomkowski @ 1CONNECT. License: Apache 2.0.
diff --git a/nginxfmt.py b/nginxfmt.py
index 71721f7..66ebf69 100755
--- a/nginxfmt.py
+++ b/nginxfmt.py
@@ -14,6 +14,7 @@ INDENTATION = ' ' * 4
 
 
 def strip_line(single_line):
+    """Strips the line and replaces neighbouring whitespaces with single space (except when within quotation marks)."""
     within_quotes = False
     parts = []
     for part in re.split('"', single_line.strip()):
@@ -26,6 +27,7 @@ def strip_line(single_line):
 
 
 def clean_lines(orig_lines):
+    """Strips the lines and splits them if they contain curly brackets."""
     cleaned_lines = []
     for line in orig_lines:
         line = strip_line(line)
@@ -38,7 +40,8 @@ def clean_lines(orig_lines):
     return cleaned_lines
 
 
-def join_opening_parenthesis(lines):
+def join_opening_bracket(lines):
+    """When opening curly bracket is in it's own line (K&R convention), it's joined with precluding line (Java)."""
     modified_lines = []
     for i in range(len(lines)):
         if i > 0 and lines[i] == "{":
@@ -49,6 +52,7 @@ def join_opening_parenthesis(lines):
 
 
 def perform_indentation(lines):
+    """Indents the lines according to their nesting level determined by curly brackets."""
     indented_lines = []
     current_indent = 0
     for line in lines:
@@ -64,8 +68,9 @@ def perform_indentation(lines):
 
 
 def format_config_file(contents):
+    """Accepts the string containing nginx configuration and returns formatted one. Adds newline at the end."""
     lines = clean_lines(contents.splitlines())
-    lines = join_opening_parenthesis(lines)
+    lines = join_opening_bracket(lines)
     lines = perform_indentation(lines)
 
     return '\n'.join(lines) + '\n'
diff --git a/test_nginxfmt.py b/test_nginxfmt.py
index 8e5771c..b7f3e1a 100644
--- a/test_nginxfmt.py
+++ b/test_nginxfmt.py
@@ -1,7 +1,12 @@
+"""Unit tests for nginxfmt module."""
+
 import unittest
 
 from nginxfmt import *
 
+__author__ = "Michał Słomkowski"
+__license__ = "Apache 2.0"
+
 
 class TestFormatter(unittest.TestCase):
     def _check_formatting(self, original_text, formatted_text):
@@ -9,7 +14,7 @@ class TestFormatter(unittest.TestCase):
 
     def test_join_opening_parenthesis(self):
         self.assertEqual(["foo", "bar {", "johan {", "tee", "ka", "}"],
-                         join_opening_parenthesis(("foo", "bar {", "johan", "{", "tee", "ka", "}")))
+                         join_opening_bracket(("foo", "bar {", "johan", "{", "tee", "ka", "}")))
 
     def test_clear_lines(self):
         self.assertEqual(["ala", "ma", "{", "kota", "}", "to;", "", "ook"],