diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..26d3352
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/libraries/API_BUT5_5.xml b/.idea/libraries/API_BUT5_5.xml
new file mode 100644
index 0000000..83edaf3
--- /dev/null
+++ b/.idea/libraries/API_BUT5_5.xml
@@ -0,0 +1,9 @@
+<component name="libraryTable">
+  <library name="API_BUT5.5">
+    <CLASSES>
+      <root url="jar://$PROJECT_DIR$/out/artifacts/API_BUT5_5_jar/API_BUT5.5.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..20f033c
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..256ede7
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/API_BUT5.5.iml" filepath="$PROJECT_DIR$/API_BUT5.5.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java b/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
index cdb9c91..18d0195 100644
--- a/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
+++ b/src/fr/iut_fbleau/raw_api_body/entity/Plateau.java
@@ -63,4 +63,44 @@ public interface Plateau {
      */
     void undoPly(Ply ply);
 
+
+    /**
+     * Used to verify if the Situation is already in the bookmarks
+     *
+     * @throws UnsupportedOperationException if the method is not yet implemented
+     *
+     * @return the answer
+     */
+    default boolean isAlreadyDone(){
+        throw new UnsupportedOperationException("Feature not yet implemented");
+    }
+
+
+    /**
+     * Used to check the value of the current Situation
+     *
+     * @throws UnsupportedOperationException if the method is not yet implemented
+     *
+     * @throws IllegalStateException if the Situation is not in the bookmarks
+     *
+     * @return the value
+     */
+    default int getSituationValue(){
+        throw new UnsupportedOperationException("Feature not yet implemented");
+    }
+
+
+
+    /**
+     * Used to add a Situation to the bookmarks
+     *
+     * @throws UnsupportedOperationException if the method is not yet implemented
+     *
+     * @throws IllegalStateException if the Situation is already in the bookmarks
+     */
+    default void addSituation(){
+        throw new UnsupportedOperationException("Feature not yet implemented");
+    }
+
+
 }
diff --git a/src/fr/iut_fbleau/raw_api_body/entity/Situation.java b/src/fr/iut_fbleau/raw_api_body/entity/Situation.java
new file mode 100644
index 0000000..1e0f4e9
--- /dev/null
+++ b/src/fr/iut_fbleau/raw_api_body/entity/Situation.java
@@ -0,0 +1,4 @@
+package fr.iut_fbleau.raw_api_body.entity;
+
+public abstract class Situation {
+}