Index: Riskeer/Integration/src/Riskeer.Integration.Data/RiskeerProject.cs
===================================================================
diff -u -r991f347230a23a879fd6ea458586576c43e5e48b -r6499f75ebc2952a2232bca32c611ec05c7b99774
--- Riskeer/Integration/src/Riskeer.Integration.Data/RiskeerProject.cs	(.../RiskeerProject.cs)	(revision 991f347230a23a879fd6ea458586576c43e5e48b)
+++ Riskeer/Integration/src/Riskeer.Integration.Data/RiskeerProject.cs	(.../RiskeerProject.cs)	(revision 6499f75ebc2952a2232bca32c611ec05c7b99774)
@@ -19,6 +19,7 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Core.Common.Base;
 using Core.Common.Base.Data;
 using Core.Common.Base.Properties;
@@ -33,22 +34,32 @@
         /// <summary>
         /// Constructs a new <see cref="RiskeerProject"/>. 
         /// </summary>
-        public RiskeerProject() : this(Resources.Project_Constructor_Default_name) {}
+        /// <param name="assessmentSection">The <see cref="AssessmentSection"/> of the project.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
+        public RiskeerProject(AssessmentSection assessmentSection) : this(Resources.Project_Constructor_Default_name, assessmentSection) {}
 
         /// <summary>
         /// Constructs a new <see cref="RiskeerProject"/>. 
         /// </summary>
         /// <param name="name">The name of the <see cref="RiskeerProject"/>.</param>
-        public RiskeerProject(string name)
+        /// <param name="assessmentSection">The <see cref="AssessmentSection"/> of the project.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
+        public RiskeerProject(string name, AssessmentSection assessmentSection)
         {
+            if (assessmentSection == null)
+            {
+                throw new ArgumentNullException(nameof(assessmentSection));
+            }
+
             Name = name;
             Description = "";
+            AssessmentSection = assessmentSection;
         }
 
         /// <summary>
-        /// Gets or sets the assessment section of the <see cref="RiskeerProject"/>.
+        /// Gets the assessment section of the <see cref="RiskeerProject"/>.
         /// </summary>
-        public AssessmentSection AssessmentSection { get; set; }
+        public AssessmentSection AssessmentSection { get; }
 
         /// <summary>
         /// Gets or sets the name of the <see cref="RiskeerProject"/>.
Index: Riskeer/Integration/test/Riskeer.Integration.Data.Test/RiskeerProjectTest.cs
===================================================================
diff -u -r991f347230a23a879fd6ea458586576c43e5e48b -r6499f75ebc2952a2232bca32c611ec05c7b99774
--- Riskeer/Integration/test/Riskeer.Integration.Data.Test/RiskeerProjectTest.cs	(.../RiskeerProjectTest.cs)	(revision 991f347230a23a879fd6ea458586576c43e5e48b)
+++ Riskeer/Integration/test/Riskeer.Integration.Data.Test/RiskeerProjectTest.cs	(.../RiskeerProjectTest.cs)	(revision 6499f75ebc2952a2232bca32c611ec05c7b99774)
@@ -34,32 +34,60 @@
     public class RiskeerProjectTest
     {
         [Test]
+        public void DefaultConstructor_AssessmentSectionNull_ThrowsArgumentNullException()
+        {
+            // Call
+            void Call() => new RiskeerProject(null);
+
+            // Assert
+            Assert.That(Call, Throws.TypeOf<ArgumentNullException>()
+                                    .With.Property(nameof(ArgumentNullException.ParamName))
+                                    .EqualTo("assessmentSection"));
+        }
+
+        [Test]
         public void DefaultConstructor_ExpectedValue()
         {
+            // Setup
+            AssessmentSection assessmentSection = CreateAssessmentSection();
+
             // Call
-            var project = new RiskeerProject();
+            var project = new RiskeerProject(assessmentSection);
 
             // Assert
             Assert.IsInstanceOf<IProject>(project);
             Assert.AreEqual("Project", project.Name);
             Assert.AreEqual("", project.Description);
-            Assert.IsNull(project.AssessmentSection);
+            Assert.AreSame(assessmentSection, project.AssessmentSection);
         }
 
         [Test]
+        public void NameConstructor_AssessmentSectionNull_ThrowsArgumentNullException()
+        {
+            // Call
+            void Call() => new RiskeerProject(string.Empty, null);
+
+            // Assert
+            Assert.That(Call, Throws.TypeOf<ArgumentNullException>()
+                                    .With.Property(nameof(ArgumentNullException.ParamName))
+                                    .EqualTo("assessmentSection"));
+        }
+
+        [Test]
         public void NameConstructor_SetNameAndInitializeOtherProperties()
         {
             // Setup
             const string someName = "<Some name>";
+            AssessmentSection assessmentSection = CreateAssessmentSection();
 
             // Call
-            var project = new RiskeerProject(someName);
+            var project = new RiskeerProject(someName, assessmentSection);
 
             // Assert
             Assert.IsInstanceOf<IProject>(project);
             Assert.AreEqual(someName, project.Name);
             Assert.AreEqual("", project.Description);
-            Assert.IsNull(project.AssessmentSection);
+            Assert.AreSame(assessmentSection, project.AssessmentSection);
         }
 
         [Test]
@@ -70,7 +98,7 @@
             const string nicerDescription = "Nicer description";
 
             // Call
-            var project = new RiskeerProject
+            var project = new RiskeerProject(CreateAssessmentSection())
             {
                 Name = niceProjectName,
                 Description = nicerDescription
@@ -90,7 +118,7 @@
             observer.Expect(o => o.UpdateObserver());
             mockRepository.ReplayAll();
 
-            var project = new RiskeerProject();
+            var project = new RiskeerProject(CreateAssessmentSection());
             project.Attach(observer);
 
             // Call
@@ -109,7 +137,7 @@
             observer.Expect(o => o.UpdateObserver());
             mockRepository.ReplayAll();
 
-            var project = new RiskeerProject();
+            var project = new RiskeerProject(CreateAssessmentSection());
             project.Attach(observer);
             project.NotifyObservers();
 
@@ -121,9 +149,17 @@
             mockRepository.VerifyAll();
         }
 
+        private static AssessmentSection CreateAssessmentSection()
+        {
+            var random = new Random(21);
+            return new AssessmentSection(random.NextEnumValue<AssessmentSectionComposition>());
+        }
+
         [TestFixture]
         private class RiskeerProjectEqualsTest : EqualsTestFixture<RiskeerProject, DerivedRiskeerProject>
         {
+            private static readonly AssessmentSection assessmentSection = CreateAssessmentSection();
+
             protected override RiskeerProject CreateObject()
             {
                 return CreateProject();
@@ -138,35 +174,34 @@
             {
                 RiskeerProject baseProject = CreateProject();
 
-                yield return new TestCaseData(new RiskeerProject("Different name")
+                yield return new TestCaseData(new RiskeerProject("Different name", assessmentSection)
                 {
                     Description = baseProject.Description
                 }).SetName("Name");
 
-                yield return new TestCaseData(new RiskeerProject(baseProject.Name))
+                yield return new TestCaseData(new RiskeerProject(baseProject.Name, assessmentSection))
                     .SetName("Description");
 
-                var random = new Random(21);
-                RiskeerProject differentAssessmentSections = CreateProject();
-                differentAssessmentSections.AssessmentSection = new AssessmentSection(random.NextEnumValue<AssessmentSectionComposition>());
+                var differentAssessmentSections = new RiskeerProject("Some name", CreateAssessmentSection())
+                {
+                    Description = "Some description"
+                };
                 yield return new TestCaseData(differentAssessmentSections)
                     .SetName("AssessmentSections");
             }
 
             private static RiskeerProject CreateProject()
             {
-                var random = new Random(21);
-                return new RiskeerProject("Some name")
+                return new RiskeerProject("Some name", assessmentSection)
                 {
-                    Description = "Some description",
-                    AssessmentSection = new AssessmentSection(random.NextEnumValue<AssessmentSectionComposition>())
+                    Description = "Some description"
                 };
             }
         }
 
         private class DerivedRiskeerProject : RiskeerProject
         {
-            public DerivedRiskeerProject(RiskeerProject project)
+            public DerivedRiskeerProject(RiskeerProject project) : base(project.AssessmentSection)
             {
                 Name = project.Name;
                 Description = project.Description;