diff --git a/org.ntlab.refactoring.decouplingClasses/src/org/ntlab/refactoring/decouplingClasses/DecoupleClassesRefactoringProcessor.java b/org.ntlab.refactoring.decouplingClasses/src/org/ntlab/refactoring/decouplingClasses/DecoupleClassesRefactoringProcessor.java
index f28f80a..b9efdf4 100644
--- a/org.ntlab.refactoring.decouplingClasses/src/org/ntlab/refactoring/decouplingClasses/DecoupleClassesRefactoringProcessor.java
+++ b/org.ntlab.refactoring.decouplingClasses/src/org/ntlab/refactoring/decouplingClasses/DecoupleClassesRefactoringProcessor.java
@@ -42,6 +42,7 @@
 import org.eclipse.jdt.core.dom.Assignment;
 import org.eclipse.jdt.core.dom.Block;
 import org.eclipse.jdt.core.dom.BodyDeclaration;
+import org.eclipse.jdt.core.dom.ClassInstanceCreation;
 import org.eclipse.jdt.core.dom.CompilationUnit;
 import org.eclipse.jdt.core.dom.Expression;
 import org.eclipse.jdt.core.dom.ExpressionStatement;
@@ -318,7 +319,9 @@
 		FieldDeclaration fieldDeclaration = createField(ast);
 		MethodDeclaration methodDeclaration = createGetObjectMethod(ast);
 		MethodDeclaration constructor = createConstructor(ast);
+		MethodDeclaration defaultConstructor = createDefaultConstructor(ast);
 		body.add(fieldDeclaration);
+		body.add(defaultConstructor);
 		body.add(constructor);
 		body.add(methodDeclaration);
 		return typeDeclaration;
@@ -411,6 +414,7 @@
 		param.setName(ast.newSimpleName(descriptor.getNewClassFieldName()));
 		methodDeclaration.parameters().add(param);
 		
+		// for assignment
 		FieldAccess fieldAccess = ast.newFieldAccess();
 		fieldAccess.setExpression(ast.newThisExpression());
 		fieldAccess.setName(ast.newSimpleName(descriptor.getNewClassFieldName()));
@@ -426,6 +430,32 @@
 		return methodDeclaration;
 	}
 	
+	private MethodDeclaration createDefaultConstructor(AST ast) {
+		MethodDeclaration methodDeclaration = ast.newMethodDeclaration();
+		methodDeclaration.setConstructor(true);
+		methodDeclaration.setName(ast.newSimpleName(descriptor.getNewClassName()));
+		methodDeclaration.modifiers().add(ast.newModifier(ModifierKeyword.PUBLIC_KEYWORD));
+		
+		// for assignment 
+		ClassInstanceCreation newClassInstanceInvocation = ast.newClassInstanceCreation();
+		newClassInstanceInvocation.setType(ast.newSimpleType(ast.newSimpleName(descriptor.getTargetName())));
+		
+		// for assignment
+		FieldAccess fieldAccess = ast.newFieldAccess();
+		fieldAccess.setExpression(ast.newThisExpression());
+		fieldAccess.setName(ast.newSimpleName(descriptor.getNewClassFieldName()));
+		
+		Block body = ast.newBlock();
+		Assignment assignment = ast.newAssignment();
+		assignment.setLeftHandSide(fieldAccess);
+		assignment.setRightHandSide(newClassInstanceInvocation);
+		
+		body.statements().add(ast.newExpressionStatement(assignment));
+		
+		methodDeclaration.setBody(body);
+		return methodDeclaration;
+	}
+	
 	@SuppressWarnings("unchecked")
 	private MethodDeclaration createGetObjectMethod(AST ast) {
 		MethodDeclaration methodDeclaration = ast.newMethodDeclaration();