diff --git a/src/FamixReplication-Smalltalk/FamixRepSmalltalkCleaner.class.st b/src/FamixReplication-Smalltalk/FamixRepSmalltalkCleaner.class.st
index cb30348..c1d7f99 100644
--- a/src/FamixReplication-Smalltalk/FamixRepSmalltalkCleaner.class.st
+++ b/src/FamixReplication-Smalltalk/FamixRepSmalltalkCleaner.class.st
@@ -6,7 +6,7 @@ I am a cleaner to clean smalltalk method code for replication detection
 "
 Class {
 	#name : 'FamixRepSmalltalkCleaner',
-	#superclass : 'FamixRepSourcesCleaner',
+	#superclass : 'FamixRepPairedCommentsCleaner',
 	#category : 'FamixReplication-Smalltalk',
 	#package : 'FamixReplication-Smalltalk'
 }
@@ -22,28 +22,6 @@ FamixRepSmalltalkCleaner >> cleanLine: aText [
 	^ (super cleanLine: aText) copyWithRegex:  '\".*\"'  matchesReplacedWith: ''
 ]
 
-{ #category : 'actions' }
-FamixRepSmalltalkCleaner >> cleanMultilineComments: aText [
-	"removes all comments possibly spanning several lines without changing the number of lines
-	 (a multi line comment becomes a set of empty lines)"
-
-	| current commentStart commentEnd |
-	current := 1.
-	^ String streamContents: [ :stream | 
-	[ 
-		commentStart := aText indexOf: $" startingAt: current.
-		commentEnd := aText indexOf: $" startingAt: commentStart + 1.
-		(commentStart > 0) and: [ commentEnd > 0 ]
-	] whileTrue: [ 
-		self copy: aText from: current to: commentStart - 1 into: stream.
-		current := commentStart + 1.
-		self copyAsEmptyLines: aText from: current to: commentEnd - 1 into: stream.
-		current := commentEnd + 1
-	].
-	self copy: aText from: current toEndInto: stream
-]
-]
-
 { #category : 'actions' }
 FamixRepSmalltalkCleaner >> isComment: aLine [
 	"we could have defined comment as 
@@ -52,3 +30,15 @@ FamixRepSmalltalkCleaner >> isComment: aLine [
 
 	^ false
 ]
+
+{ #category : 'actions' }
+FamixRepSmalltalkCleaner >> multilineCommentCloser [
+
+	^ '"'
+]
+
+{ #category : 'actions' }
+FamixRepSmalltalkCleaner >> multilineCommentOpener [
+
+	^ '"'
+]