diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
index d33ecc4..d88e39f 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
@@ -10,7 +10,6 @@ class CustomTimerInfo(
     id: String = ""
 ):  TimerInfo(id, name, description) {
 
-
     override fun getFunctionalTimer(): FunctionalTimer {
         return FunctionalCustomTimer(studyTime)
     }
@@ -24,4 +23,8 @@ class CustomTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitCustomTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
index d459a4e..45f7fd7 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
@@ -22,4 +22,8 @@ class EndlessTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitEndlessTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
index 18bcea6..dbbb0be 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
@@ -2,13 +2,14 @@ package be.ugent.sel.studeez.data.local.models.timer_info
 
 import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalPomodoroTimer
 import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimer
+import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimerVisitor
 
 class PomodoroTimerInfo(
     name: String,
     description: String,
-    private val studyTime: Int,
-    private val breakTime: Int,
-    private val repeats: Int,
+    val studyTime: Int,
+    val breakTime: Int,
+    val repeats: Int,
     id: String = ""
 ):  TimerInfo(id, name, description) {
 
@@ -28,4 +29,8 @@ class PomodoroTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitBreakTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
index 343e7e3..e4deded 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
@@ -7,8 +7,8 @@ import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimer
  */
 abstract class TimerInfo(
     val id: String,
-    val name: String,
-    val description: String
+    var name: String,
+    var description: String
 ) {
 
     /**
@@ -21,6 +21,7 @@ abstract class TimerInfo(
      * TODO implementaties hebben nog hardgecodeerde strings.
      */
     abstract fun asJson(): Map<String, Any>
+    abstract fun <T> accept(visitor: TimerInfoVisitor<T>): T
 
 }
 
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt
index 0dedc94..e331c8d 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt
@@ -1,4 +1,11 @@
 package be.ugent.sel.studeez.data.local.models.timer_info
 
-interface TimerInfoVisitor {
+interface TimerInfoVisitor<T> {
+
+    fun visitCustomTimerInfo(customTimerInfo: CustomTimerInfo): T
+
+    fun visitEndlessTimerInfo(endlessTimerInfo: EndlessTimerInfo): T
+
+    fun visitBreakTimerInfo(pomodoroTimerInfo: PomodoroTimerInfo): T
+
 }
\ No newline at end of file