diff --git a/Documentation/Diagrammes_de_seq/Boutique.mdj b/Documentation/Diagrammes_de_seq/Boutique.mdj
new file mode 100644
index 0000000..ba37756
--- /dev/null
+++ b/Documentation/Diagrammes_de_seq/Boutique.mdj
@@ -0,0 +1,2323 @@
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+												{
+													"_type": "UMLActivationView",
+													"_id": "AAAAAAGDwgw74VioTxc=",
+													"_parent": {
+														"$ref": "AAAAAAGDwgw74FikkV8="
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+													"model": {
+														"$ref": "AAAAAAGDwgw73Fij9+8="
+													},
+													"font": "Arial;13;0",
+													"left": 534,
+													"top": 168,
+													"width": 14,
+													"height": 29
+												}
+											],
+											"font": "Arial;13;0",
+											"head": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
+											},
+											"tail": {
+												"$ref": "AAAAAAGDwgk2ClgHNzE="
+											},
+											"points": "250:168;534:168",
+											"nameLabel": {
+												"$ref": "AAAAAAGDwgw74ViliMo="
+											},
+											"stereotypeLabel": {
+												"$ref": "AAAAAAGDwgw74Vimy5o="
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+											"propertyLabel": {
+												"$ref": "AAAAAAGDwgw74Vin/RI="
+											},
+											"activation": {
+												"$ref": "AAAAAAGDwgw74VioTxc="
+											}
+										},
+										{
+											"_type": "UMLSeqMessageView",
+											"_id": "AAAAAAGDwg4d11i+6K4=",
+											"_parent": {
+												"$ref": "AAAAAAGDwgfMlFfxhm8="
+											},
+											"model": {
+												"$ref": "AAAAAAGDwg4d1Fi9n4Q="
+											},
+											"subViews": [
+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwg4d2Fi/XoQ=",
+													"_parent": {
+														"$ref": "AAAAAAGDwg4d11i+6K4="
+													},
+													"model": {
+														"$ref": "AAAAAAGDwg4d1Fi9n4Q="
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+													"font": "Arial;13;0",
+													"left": 586,
+													"top": 192,
+													"width": 246.40966796875,
+													"height": 13,
+													"alpha": 1.601089084420094,
+													"distance": 132.06059215375342,
+													"hostEdge": {
+														"$ref": "AAAAAAGDwg4d11i+6K4="
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+													"edgePosition": 1,
+													"text": "4 : Regarde si l'utilisateur a assez d'argent"
+												},
+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwg4d2FjAeHU=",
+													"_parent": {
+														"$ref": "AAAAAAGDwg4d11i+6K4="
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+														"$ref": "AAAAAAGDwg4d1Fi9n4Q="
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+													"visible": false,
+													"font": "Arial;13;0",
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+													"distance": 25,
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+													"edgePosition": 1
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+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwg4d2FjB6ns=",
+													"_parent": {
+														"$ref": "AAAAAAGDwg4d11i+6K4="
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+													"model": {
+														"$ref": "AAAAAAGDwg4d1Fi9n4Q="
+													},
+													"visible": false,
+													"font": "Arial;13;0",
+													"left": 567,
+													"top": 196,
+													"height": 13,
+													"alpha": -1.5707963267948966,
+													"distance": 10,
+													"hostEdge": {
+														"$ref": "AAAAAAGDwg4d11i+6K4="
+													},
+													"edgePosition": 1
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+												{
+													"_type": "UMLActivationView",
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+													"_parent": {
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+													"model": {
+														"$ref": "AAAAAAGDwg4d1Fi9n4Q="
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+													"font": "Arial;13;0",
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+													"top": 212,
+													"width": 14,
+													"height": 29
+												}
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+											"font": "Arial;13;0",
+											"head": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+											"tail": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+											"nameLabel": {
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+											"stereotypeLabel": {
+												"$ref": "AAAAAAGDwg4d2FjAeHU="
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+											"propertyLabel": {
+												"$ref": "AAAAAAGDwg4d2FjB6ns="
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+											"activation": {
+												"$ref": "AAAAAAGDwg4d2FjC+dA="
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+										},
+										{
+											"_type": "UMLCombinedFragmentView",
+											"_id": "AAAAAAGDwhM7qVpJX6g=",
+											"_parent": {
+												"$ref": "AAAAAAGDwgfMlFfxhm8="
+											},
+											"model": {
+												"$ref": "AAAAAAGDwhM7plpHqzw="
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+											"subViews": [
+												{
+													"_type": "LabelView",
+													"_id": "AAAAAAGDwhM7qVpK8uA=",
+													"_parent": {
+														"$ref": "AAAAAAGDwhM7qVpJX6g="
+													},
+													"font": "Arial;13;0",
+													"left": 40.72998046875,
+													"top": 213,
+													"width": 123.1162109375,
+													"height": 13,
+													"text": "CombinedFragment1"
+												},
+												{
+													"_type": "LabelView",
+													"_id": "AAAAAAGDwhM7qlpLP6A=",
+													"_parent": {
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+													"font": "Arial;13;1",
+													"left": 21,
+													"top": 213,
+													"width": 14.72998046875,
+													"height": 13,
+													"text": "alt"
+												},
+												{
+													"_type": "UMLInteractionOperandCompartmentView",
+													"_id": "AAAAAAGDwhM7qlpMXnY=",
+													"_parent": {
+														"$ref": "AAAAAAGDwhM7qVpJX6g="
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+													"model": {
+														"$ref": "AAAAAAGDwhM7plpHqzw="
+													},
+													"subViews": [
+														{
+															"_type": "UMLInteractionOperandView",
+															"_id": "AAAAAAGDwhM7xlpYBcY=",
+															"_parent": {
+																"$ref": "AAAAAAGDwhM7qlpMXnY="
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+															"model": {
+																"$ref": "AAAAAAGDwhM7qFpIHns="
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+															"subViews": [
+																{
+																	"_type": "LabelView",
+																	"_id": "AAAAAAGDwhM7xlpZLso=",
+																	"_parent": {
+																		"$ref": "AAAAAAGDwhM7xlpYBcY="
+																	},
+																	"font": "Arial;13;0",
+																	"left": 36,
+																	"top": 246,
+																	"width": 176.94091796875,
+																	"height": 13,
+																	"text": "[if l'utilisateur a assez d'argent]"
+																}
+															],
+															"font": "Arial;13;0",
+															"left": 16,
+															"top": 231,
+															"width": 729,
+															"height": 106,
+															"guardLabel": {
+																"$ref": "AAAAAAGDwhM7xlpZLso="
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+														{
+															"_type": "UMLInteractionOperandView",
+															"_id": "AAAAAAGDwiElCNG6AhM=",
+															"_parent": {
+																"$ref": "AAAAAAGDwhM7qlpMXnY="
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+																"$ref": "AAAAAAGDwiEk29G38pw="
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+															"subViews": [
+																{
+																	"_type": "LabelView",
+																	"_id": "AAAAAAGDwiElCNG7Jn4=",
+																	"_parent": {
+																		"$ref": "AAAAAAGDwiElCNG6AhM="
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+																	"font": "Arial;13;0",
+																	"left": 36,
+																	"top": 352,
+																	"width": 211.224609375,
+																	"height": 13,
+																	"text": "[if l'utilisateur n'a pas assez d'argent]"
+																}
+															],
+															"font": "Arial;13;0",
+															"left": 16,
+															"top": 337,
+															"width": 729,
+															"height": 104,
+															"guardLabel": {
+																"$ref": "AAAAAAGDwiElCNG7Jn4="
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+													"font": "Arial;13;0",
+													"left": 16,
+													"top": 231,
+													"width": 729,
+													"height": 210
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+											"font": "Arial;13;0",
+											"left": 16,
+											"top": 208,
+											"width": 729,
+											"height": 233,
+											"nameLabel": {
+												"$ref": "AAAAAAGDwhM7qVpK8uA="
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+											"frameTypeLabel": {
+												"$ref": "AAAAAAGDwhM7qlpLP6A="
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+											"operandCompartment": {
+												"$ref": "AAAAAAGDwhM7qlpMXnY="
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+										{
+											"_type": "UMLSeqMessageView",
+											"_id": "AAAAAAGDwh2TddFONl0=",
+											"_parent": {
+												"$ref": "AAAAAAGDwgfMlFfxhm8="
+											},
+											"model": {
+												"$ref": "AAAAAAGDwh2Tc9FNDMA="
+											},
+											"subViews": [
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+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwh2TdtFPoxE=",
+													"_parent": {
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+														"$ref": "AAAAAAGDwh2Tc9FNDMA="
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+													"font": "Arial;13;0",
+													"left": 584,
+													"top": 232,
+													"width": 299.4697265625,
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+													"hostEdge": {
+														"$ref": "AAAAAAGDwh2TddFONl0="
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+													"edgePosition": 1,
+													"text": "5 : Ajouter le skin dans la liste de skin de l'utilisateur"
+												},
+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwh2TfNFQ4z8=",
+													"_parent": {
+														"$ref": "AAAAAAGDwh2TddFONl0="
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+													"model": {
+														"$ref": "AAAAAAGDwh2Tc9FNDMA="
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+													"visible": false,
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+													"alpha": 1.5707963267948966,
+													"distance": 25,
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+													"edgePosition": 1
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+													"_id": "AAAAAAGDwh2TfNFRQGk=",
+													"_parent": {
+														"$ref": "AAAAAAGDwh2TddFONl0="
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+													"model": {
+														"$ref": "AAAAAAGDwh2Tc9FNDMA="
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+													"visible": false,
+													"font": "Arial;13;0",
+													"left": 567,
+													"top": 236,
+													"height": 13,
+													"alpha": -1.5707963267948966,
+													"distance": 10,
+													"hostEdge": {
+														"$ref": "AAAAAAGDwh2TddFONl0="
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+													"edgePosition": 1
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+												{
+													"_type": "UMLActivationView",
+													"_id": "AAAAAAGDwh2TfdFSL7k=",
+													"_parent": {
+														"$ref": "AAAAAAGDwh2TddFONl0="
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+													"model": {
+														"$ref": "AAAAAAGDwh2Tc9FNDMA="
+													},
+													"font": "Arial;13;0",
+													"left": 534,
+													"top": 252,
+													"width": 14,
+													"height": 29
+												}
+											],
+											"font": "Arial;13;0",
+											"head": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
+											},
+											"tail": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+											"nameLabel": {
+												"$ref": "AAAAAAGDwh2TdtFPoxE="
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+											"stereotypeLabel": {
+												"$ref": "AAAAAAGDwh2TfNFQ4z8="
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+											"propertyLabel": {
+												"$ref": "AAAAAAGDwh2TfNFRQGk="
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+											"activation": {
+												"$ref": "AAAAAAGDwh2TfdFSL7k="
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+										{
+											"_type": "UMLSeqMessageView",
+											"_id": "AAAAAAGDwh5JrNFrXwI=",
+											"_parent": {
+												"$ref": "AAAAAAGDwgfMlFfxhm8="
+											},
+											"model": {
+												"$ref": "AAAAAAGDwh5JqtFqsEs="
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+											"subViews": [
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+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwh5JrtFsUmA=",
+													"_parent": {
+														"$ref": "AAAAAAGDwh5JrNFrXwI="
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+													"model": {
+														"$ref": "AAAAAAGDwh5JqtFqsEs="
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+													"font": "Arial;13;0",
+													"left": 584,
+													"top": 283,
+													"width": 185.60546875,
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+													"alpha": 1.5803188474815624,
+													"distance": 105.00476179678711,
+													"hostEdge": {
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+													"edgePosition": 1,
+													"text": "6 : Retire l'argent de l'utilisateur"
+												},
+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGDwh5JrtFtT+E=",
+													"_parent": {
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+														"$ref": "AAAAAAGDwh5JqtFqsEs="
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+														"$ref": "AAAAAAGDwh5JqtFqsEs="
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+													"alpha": -1.5707963267948966,
+													"distance": 10,
+													"hostEdge": {
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+												{
+													"_type": "UMLActivationView",
+													"_id": "AAAAAAGDwh5JrtFvv/Q=",
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+														"$ref": "AAAAAAGDwh5JqtFqsEs="
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+													"top": 300,
+													"width": 14,
+													"height": 29
+												}
+											],
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+											"head": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+											"nameLabel": {
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+												"$ref": "AAAAAAGDwh5JrtFtT+E="
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+											"propertyLabel": {
+												"$ref": "AAAAAAGDwh5JrtFuOwM="
+											},
+											"activation": {
+												"$ref": "AAAAAAGDwh5JrtFvv/Q="
+											}
+										},
+										{
+											"_type": "UMLSeqMessageView",
+											"_id": "AAAAAAGD1ZFqnOdzLgQ=",
+											"_parent": {
+												"$ref": "AAAAAAGDwgfMlFfxhm8="
+											},
+											"model": {
+												"$ref": "AAAAAAGD1ZFqmedyefY="
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+											"subViews": [
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+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGD1ZFqned0GyA=",
+													"_parent": {
+														"$ref": "AAAAAAGD1ZFqnOdzLgQ="
+													},
+													"model": {
+														"$ref": "AAAAAAGD1ZFqmedyefY="
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+													"top": 356,
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+													"alpha": 1.5707963267948966,
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+													"hostEdge": {
+														"$ref": "AAAAAAGD1ZFqnOdzLgQ="
+													},
+													"edgePosition": 1,
+													"text": "7 : Affiche un message d'erreur"
+												},
+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGD1ZFqned1JSE=",
+													"_parent": {
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+													"font": "Arial;13;0",
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+													"alpha": 1.5707963267948966,
+													"distance": 25,
+													"hostEdge": {
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+													},
+													"edgePosition": 1
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+												{
+													"_type": "EdgeLabelView",
+													"_id": "AAAAAAGD1ZFqned2TTA=",
+													"_parent": {
+														"$ref": "AAAAAAGD1ZFqnOdzLgQ="
+													},
+													"model": {
+														"$ref": "AAAAAAGD1ZFqmedyefY="
+													},
+													"visible": false,
+													"font": "Arial;13;0",
+													"left": 395,
+													"top": 336,
+													"height": 13,
+													"alpha": -1.5707963267948966,
+													"distance": 10,
+													"hostEdge": {
+														"$ref": "AAAAAAGD1ZFqnOdzLgQ="
+													},
+													"edgePosition": 1
+												},
+												{
+													"_type": "UMLActivationView",
+													"_id": "AAAAAAGD1ZFqned39e0=",
+													"_parent": {
+														"$ref": "AAAAAAGD1ZFqnOdzLgQ="
+													},
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+														"$ref": "AAAAAAGD1ZFqmedyefY="
+													},
+													"visible": false,
+													"font": "Arial;13;0",
+													"left": 250,
+													"top": 352,
+													"width": 14,
+													"height": 25
+												}
+											],
+											"font": "Arial;13;0",
+											"head": {
+												"$ref": "AAAAAAGDwgk2ClgHNzE="
+											},
+											"tail": {
+												"$ref": "AAAAAAGDwglLHlgnkSM="
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+											"points": "541:352;250:352",
+											"nameLabel": {
+												"$ref": "AAAAAAGD1ZFqned0GyA="
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+												{
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+											"font": "Arial;13;0",
+											"head": {
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+											"stereotypeLabel": {
+												"$ref": "AAAAAAGD1ZVJZefZ3hw="
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+											"propertyLabel": {
+												"$ref": "AAAAAAGD1ZVJZefamKE="
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+											"activation": {
+												"$ref": "AAAAAAGD1ZVJZefbPzg="
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+								}
+							],
+							"messages": [
+								{
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+									"_id": "AAAAAAGDwgozEVh3fZw=",
+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+									"name": "Clique sur le skin voulu",
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+									"target": {
+										"$ref": "AAAAAAGDwglLHlggqQI="
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+								{
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+									"_id": "AAAAAAGDwgtml1iNvYU=",
+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+										"$ref": "AAAAAAGDwglLHlggqQI="
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+									"target": {
+										"$ref": "AAAAAAGDwgk2CFgA8ZU="
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+									"messageSort": "reply"
+								},
+								{
+									"_type": "UMLMessage",
+									"_id": "AAAAAAGDwgw73Fij9+8=",
+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+									"name": "Appuye sur le prix du skin",
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+									"target": {
+										"$ref": "AAAAAAGDwglLHlggqQI="
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+										"$ref": "AAAAAAGDwglLHlggqQI="
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+									"_parent": {
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+									"name": "Ajouter le skin dans la liste de skin de l'utilisateur",
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+									"target": {
+										"$ref": "AAAAAAGDwglLHlggqQI="
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+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+									"name": "Retire l'argent de l'utilisateur",
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+									"target": {
+										"$ref": "AAAAAAGDwglLHlggqQI="
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+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+									"name": "Affiche un message d'erreur",
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+									"target": {
+										"$ref": "AAAAAAGDwgk2CFgA8ZU="
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+									"messageSort": "reply"
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+								{
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+									"_id": "AAAAAAGD1ZOmceeJrcw=",
+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
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+									"name": "Appuye sur fermer",
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+										"$ref": "AAAAAAGDwgk2CFgA8ZU="
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+									"target": {
+										"$ref": "AAAAAAGDwglLHlggqQI="
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+								},
+								{
+									"_type": "UMLMessage",
+									"_id": "AAAAAAGD1ZVJYefWJaw=",
+									"_parent": {
+										"$ref": "AAAAAAGDwgfMklfweCY="
+									},
+									"name": "Renvoie l'utilisateur sur la page de la boutique",
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+									"target": {
+										"$ref": "AAAAAAGDwgk2CFgA8ZU="
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+									"messageSort": "reply"
+								}
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+							"participants": [
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+									"represent": {
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+									"isMultiInstance": false
+								},
+								{
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+									"_id": "AAAAAAGDwglLHlggqQI=",
+									"_parent": {
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+									"name": "Application",
+									"represent": {
+										"$ref": "AAAAAAGDwglLHVgfO2E="
+									},
+									"isMultiInstance": false
+								}
+							],
+							"fragments": [
+								{
+									"_type": "UMLCombinedFragment",
+									"_id": "AAAAAAGDwhM7plpHqzw=",
+									"_parent": {
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+									},
+									"name": "CombinedFragment1",
+									"interactionOperator": "alt",
+									"operands": [
+										{
+											"_type": "UMLInteractionOperand",
+											"_id": "AAAAAAGDwhM7qFpIHns=",
+											"_parent": {
+												"$ref": "AAAAAAGDwhM7plpHqzw="
+											},
+											"name": "Operand1",
+											"guard": "if l'utilisateur a assez d'argent"
+										},
+										{
+											"_type": "UMLInteractionOperand",
+											"_id": "AAAAAAGDwiEk29G38pw=",
+											"_parent": {
+												"$ref": "AAAAAAGDwhM7plpHqzw="
+											},
+											"name": "InteractionOperand1",
+											"guard": "if l'utilisateur n'a pas assez d'argent"
+										}
+									]
+								}
+							]
+						}
+					],
+					"attributes": [
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+							"_type": "UMLAttribute",
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+							"_parent": {
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+							"name": "Role1",
+							"type": ""
+						},
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+							"_id": "AAAAAAGDwgCSY1chpmU=",
+							"_parent": {
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+							},
+							"name": "Role2",
+							"type": ""
+						},
+						{
+							"_type": "UMLAttribute",
+							"_id": "AAAAAAGDwgk2B1f/Rlo=",
+							"_parent": {
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+							"name": "Role3",
+							"type": ""
+						},
+						{
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+							"_id": "AAAAAAGDwglLHVgfO2E=",
+							"_parent": {
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+							"name": "Role4",
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+				}
+			]
+		}
+	]
+}
\ No newline at end of file