diff --git a/.project b/.project
new file mode 100644
index 0000000..f4c2b6a
--- /dev/null
+++ b/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>rdpy</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.python.pydev.PyDevBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.python.pydev.pythonNature</nature>
+	</natures>
+</projectDescription>
diff --git a/.pydevproject b/.pydevproject
new file mode 100644
index 0000000..653ca1b
--- /dev/null
+++ b/.pydevproject
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?><pydev_project>
+<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
+<path>/rdpy</path>
+</pydev_pathproperty>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">twisted-rdp-vnc</pydev_property>
+</pydev_project>
diff --git a/rdpy/protocols/common/layer.py b/rdpy/protocols/common/layer.py
index 9859564..baf9960 100644
--- a/rdpy/protocols/common/layer.py
+++ b/rdpy/protocols/common/layer.py
@@ -1,25 +1,28 @@
 '''
-Created on 5 sept. 2013
-
-@author: sylvain
+@author: citronneur
 '''
-
 class Layer(object):
     '''
-    classdocs
+    Network abstraction for protocol
+    Try as possible to divide user protocol in layer
+    default implementation is a transparent layer
     '''
     def __init__(self, presentation = None):
         '''
         Constructor
         '''
+        #presentation layer higher layer in model
         self._presentation = presentation
-        self._transport= None
+        #transport layer under layer in model
+        self._transport = None
+        #auto set transport layer of own presentation layer
         if not self._presentation is None:
             self._presentation._transport = self
     
     def connect(self):
         '''
-        signal that the transport layer is OK
+        call when transport layer is connected
+        default is send connect event to presentation layer
         '''
         if not self._presentation is None:
             self._presentation.connect()
@@ -27,12 +30,16 @@ class Layer(object):
     def read(self, data):
         '''
         signal that data is available for this layer
+        call by transport layer
+        default is to pass data to presentation layer
         '''
         if not self._presentation is None:
             self._presentation.read(data)
       
     def write(self, data):
         '''
-        write using transport layer
+        classical use by presentation layer
+        write data for this layer
+        default pass data to transport layer
         '''
         self.transport.write(data)
\ No newline at end of file
diff --git a/rdpy/protocols/common/protocolbuffer.py b/rdpy/protocols/common/protocolbuffer.py
index 93997a2..f51c5f0 100644
--- a/rdpy/protocols/common/protocolbuffer.py
+++ b/rdpy/protocols/common/protocolbuffer.py
@@ -1,6 +1,4 @@
 '''
-Created on 17 aout 2013
-
 @author: sylvain
 '''
 from twisted.internet import protocol