diff --git a/assignment/src/main/java/appointmentplanner/LocalDayPlanImpl.java b/assignment/src/main/java/appointmentplanner/LocalDayPlanImpl.java
new file mode 100644
index 0000000..4604dac
--- /dev/null
+++ b/assignment/src/main/java/appointmentplanner/LocalDayPlanImpl.java
@@ -0,0 +1,109 @@
+package appointmentplanner;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.Predicate;
+
+import appointmentplanner.api.Appointment;
+import appointmentplanner.api.AppointmentData;
+import appointmentplanner.api.AppointmentRequest;
+import appointmentplanner.api.LocalDay;
+import appointmentplanner.api.LocalDayPlan;
+import appointmentplanner.api.TimePreference;
+import appointmentplanner.api.TimeSlot;
+
+public class LocalDayPlanImpl implements LocalDayPlan {
+
+  public LocalDayPlanImpl(LocalDay day, Instant startOfDay, Instant endOfDay) {
+    throw new UnsupportedOperationException("Unimplemented constructor 'LocalDayPlanImpl'");
+  }
+
+  @Override
+  public LocalDay day() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'day'");
+  }
+
+  @Override
+  public Instant startOfDay() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'startOfDay'");
+  }
+
+  @Override
+  public Instant endOfDay() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'endOfDay'");
+  }
+
+  @Override
+  public Optional<Appointment> addAppointment(AppointmentData appointmentData, LocalTime start,
+      TimePreference fallback) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'addAppointment'");
+  }
+
+  @Override
+  public Optional<Appointment> addAppointment(AppointmentData appointmentData, LocalTime startTime) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'addAppointment'");
+  }
+
+  @Override
+  public Optional<Appointment> addAppointment(AppointmentData appointmentData, TimePreference preference) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'addAppointment'");
+  }
+
+  @Override
+  public AppointmentRequest removeAppointment(Appointment appointment) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'removeAppointment'");
+  }
+
+  @Override
+  public List<AppointmentRequest> removeAppointments(Predicate<Appointment> filter) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'removeAppointments'");
+  }
+
+  @Override
+  public List<Appointment> appointments() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'appointments'");
+  }
+
+  @Override
+  public List<TimeSlot> findMatchingFreeSlotsOfDuration(Duration duration, List<LocalDayPlan> plans) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'findMatchingFreeSlotsOfDuration'");
+  }
+
+  @Override
+  public List<TimeSlot> findGapsFitting(Duration duration) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'findGapsFitting'");
+  }
+
+  @Override
+  public List<Appointment> findAppointments(Predicate<Appointment> filter) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'findAppointments'");
+  }
+
+  @Override
+  public boolean contains(Appointment appointment) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'contains'");
+  }
+
+  @Override
+  public int nrOfAppointments() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'nrOfAppointments'");
+  }
+
+}
diff --git a/assignment/src/test/java/appointmentplanner/LocalDayPlanTest.java b/assignment/src/test/java/appointmentplanner/LocalDayPlanTest.java
new file mode 100644
index 0000000..ad87913
--- /dev/null
+++ b/assignment/src/test/java/appointmentplanner/LocalDayPlanTest.java
@@ -0,0 +1,42 @@
+package appointmentplanner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.time.Instant;
+import java.time.LocalTime;
+import java.util.stream.Stream;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import appointmentplanner.api.LocalDay;
+import appointmentplanner.api.LocalDayPlan;
+
+public class LocalDayPlanTest {
+
+  private static Stream<Arguments> provideLocalDPDataset() {
+    return Stream.of(
+        Arguments.of(new LocalDay(), Instant.parse("2023-01-01T08:30:00Z"), Instant.parse("2023-01-01T17:30:00Z")),
+        Arguments.of(new LocalDay(), Instant.parse("2023-06-15T09:00:00Z"), Instant.parse("2023-06-15T18:00:00Z")),
+        Arguments.of(new LocalDay(), Instant.parse("2024-12-31T07:00:00Z"), Instant.parse("2024-12-31T16:00:00Z")));
+  }
+
+  @ParameterizedTest
+  @MethodSource("provideLocalDPDataset")
+  void ldPlanInit_shouldBeSuccessful(LocalDay day, Instant start, Instant end) {
+    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);
+    assertThat(plan).isNotNull();
+  }
+
+  @ParameterizedTest
+  @MethodSource("provideLocalDPDataset")
+  void ldPlanGetters_shouldReturnSetValues(LocalDay day, Instant start, Instant end) {
+    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);
+
+    assertThat(plan.day()).isEqualTo(day);
+    assertThat(plan.startOfDay()).isEqualTo(start);
+    assertThat(plan.endOfDay()).isEqualTo(end);
+  }
+
+}