diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2e74c4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.iml
+.idea
+target
\ No newline at end of file
diff --git a/.mvn/maven.config b/.mvn/maven.config
new file mode 100644
index 0000000..d267dac
--- /dev/null
+++ b/.mvn/maven.config
@@ -0,0 +1,3 @@
+-s.mvn\settings-local.xml
+
+-Dmaven.repo.local=D:\workspace\private\.m2repo
\ No newline at end of file
diff --git a/.mvn/settings-local.xml b/.mvn/settings-local.xml
new file mode 100644
index 0000000..24c1925
--- /dev/null
+++ b/.mvn/settings-local.xml
@@ -0,0 +1,265 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+<!--
+ | This is the configuration file for Maven. It can be specified at two levels:
+ |
+ |  1. User Level. This settings.xml file provides configuration for a single user,
+ |                 and is normally provided in ${user.home}/.m2/settings.xml.
+ |
+ |                 NOTE: This location can be overridden with the CLI option:
+ |
+ |                 -s /path/to/user/settings.xml
+ |
+ |  2. Global Level. This settings.xml file provides configuration for all Maven
+ |                 users on a machine (assuming they're all using the same Maven
+ |                 installation). It's normally provided in
+ |                 ${maven.conf}/settings.xml.
+ |
+ |                 NOTE: This location can be overridden with the CLI option:
+ |
+ |                 -gs /path/to/global/settings.xml
+ |
+ | The sections in this sample file are intended to give you a running start at
+ | getting the most out of your Maven installation. Where appropriate, the default
+ | values (values used when the setting is not specified) are provided.
+ |
+ |-->
+<settings xmlns="http://maven.apache.org/SETTINGS/1.2.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.2.0 https://maven.apache.org/xsd/settings-1.2.0.xsd">
+    <!-- localRepository
+     | The path to the local repository maven will use to store artifacts.
+     |
+     | Default: ${user.home}/.m2/repository
+    <localRepository>/path/to/local/repo</localRepository>
+    -->
+
+    <!-- interactiveMode
+     | This will determine whether maven prompts you when it needs input. If set to false,
+     | maven will use a sensible default value, perhaps based on some other setting, for
+     | the parameter in question.
+     |
+     | Default: true
+    <interactiveMode>true</interactiveMode>
+    -->
+
+    <!-- offline
+     | Determines whether maven should attempt to connect to the network when executing a build.
+     | This will have an effect on artifact downloads, artifact deployment, and others.
+     |
+     | Default: false
+    <offline>false</offline>
+    -->
+
+    <!-- pluginGroups
+     | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
+     | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
+     | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
+     |-->
+    <pluginGroups>
+        <!-- pluginGroup
+         | Specifies a further group identifier to use for plugin lookup.
+        <pluginGroup>com.your.plugins</pluginGroup>
+        -->
+    </pluginGroups>
+
+    <!-- TODO Since when can proxies be selected as depicted? -->
+    <!-- proxies
+     | This is a list of proxies which can be used on this machine to connect to the network.
+     | Unless otherwise specified (by system property or command-line switch), the first proxy
+     | specification in this list marked as active will be used.
+     |-->
+    <proxies>
+        <!-- proxy
+         | Specification for one proxy, to be used in connecting to the network.
+         |
+        <proxy>
+          <id>optional</id>
+          <active>true</active>
+          <protocol>http</protocol>
+          <username>proxyuser</username>
+          <password>proxypass</password>
+          <host>proxy.host.net</host>
+          <port>80</port>
+          <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
+        </proxy>
+        -->
+    </proxies>
+
+    <!-- servers
+     | This is a list of authentication profiles, keyed by the server-id used within the system.
+     | Authentication profiles can be used whenever maven must make a connection to a remote server.
+     |-->
+    <servers>
+        <!-- server
+         | Specifies the authentication information to use when connecting to a particular server, identified by
+         | a unique name within the system (referred to by the 'id' attribute below).
+         |
+         | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
+         |       used together.
+         |
+        <server>
+          <id>deploymentRepo</id>
+          <username>repouser</username>
+          <password>repopwd</password>
+        </server>
+        -->
+
+        <!-- Another sample, using keys to authenticate.
+        <server>
+          <id>siteServer</id>
+          <privateKey>/path/to/private/key</privateKey>
+          <passphrase>optional; leave empty if not used.</passphrase>
+        </server>
+        -->
+    </servers>
+
+    <!-- mirrors
+     | This is a list of mirrors to be used in downloading artifacts from remote repositories.
+     |
+     | It works like this: a POM may declare a repository to use in resolving certain artifacts.
+     | However, this repository may have problems with heavy traffic at times, so people have mirrored
+     | it to several places.
+     |
+     | That repository definition will have a unique id, so we can create a mirror reference for that
+     | repository, to be used as an alternate download site. The mirror site will be the preferred
+     | server for that repository.
+     |-->
+    <mirrors>
+        <!-- mirror
+         | Specifies a repository mirror site to use instead of a given repository. The repository that
+         | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
+         | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
+         |
+        <mirror>
+          <id>mirrorId</id>
+          <mirrorOf>repositoryId</mirrorOf>
+          <name>Human Readable Name for this Mirror.</name>
+          <url>http://my.repository.com/repo/path</url>
+        </mirror>
+         -->
+        <mirror>
+            <id>maven-default-http-blocker</id>
+            <mirrorOf>external:http:*</mirrorOf>
+            <name>Pseudo repository to mirror external repositories initially using HTTP.</name>
+            <url>http://0.0.0.0/</url>
+            <blocked>true</blocked>
+        </mirror>
+    </mirrors>
+
+    <!-- profiles
+     | This is a list of profiles which can be activated in a variety of ways, and which can modify
+     | the build process. Profiles provided in the settings.xml are intended to provide local machine-
+     | specific paths and repository locations which allow the build to work in the local environment.
+     |
+     | For example, if you have an integration testing plugin - like cactus - that needs to know where
+     | your Tomcat instance is installed, you can provide a variable here such that the variable is
+     | dereferenced during the build process to configure the cactus plugin.
+     |
+     | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
+     | section of this document (settings.xml) - will be discussed later. Another way essentially
+     | relies on the detection of a property, either matching a particular value for the property,
+     | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
+     | value of '1.4' might activate a profile when the build is executed on a JDK version of '1.4.2_07'.
+     | Finally, the list of active profiles can be specified directly from the command line.
+     |
+     | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
+     |       repositories, plugin repositories, and free-form properties to be used as configuration
+     |       variables for plugins in the POM.
+     |
+     |-->
+    <profiles>
+        <!-- profile
+         | Specifies a set of introductions to the build process, to be activated using one or more of the
+         | mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
+         | or the command line, profiles have to have an ID that is unique.
+         |
+         | An encouraged best practice for profile identification is to use a consistent naming convention
+         | for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey', 'user-brett', etc.
+         | This will make it more intuitive to understand what the set of introduced profiles is attempting
+         | to accomplish, particularly when you only have a list of profile id's for debug.
+         |
+         | This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
+        <profile>
+          <id>jdk-1.4</id>
+
+          <activation>
+            <jdk>1.4</jdk>
+          </activation>
+
+          <repositories>
+            <repository>
+              <id>jdk14</id>
+              <name>Repository for JDK 1.4 builds</name>
+              <url>http://www.myhost.com/maven/jdk14</url>
+              <layout>default</layout>
+              <snapshotPolicy>always</snapshotPolicy>
+            </repository>
+          </repositories>
+        </profile>
+        -->
+
+        <!--
+         | Here is another profile, activated by the property 'target-env' with a value of 'dev', which
+         | provides a specific path to the Tomcat instance. To use this, your plugin configuration might
+         | hypothetically look like:
+         |
+         | ...
+         | <plugin>
+         |   <groupId>org.myco.myplugins</groupId>
+         |   <artifactId>myplugin</artifactId>
+         |
+         |   <configuration>
+         |     <tomcatLocation>${tomcatPath}</tomcatLocation>
+         |   </configuration>
+         | </plugin>
+         | ...
+         |
+         | NOTE: If you just wanted to inject this configuration whenever someone set 'target-env' to
+         |       anything, you could just leave off the <value/> inside the activation-property.
+         |
+        <profile>
+          <id>env-dev</id>
+
+          <activation>
+            <property>
+              <name>target-env</name>
+              <value>dev</value>
+            </property>
+          </activation>
+
+          <properties>
+            <tomcatPath>/path/to/tomcat/instance</tomcatPath>
+          </properties>
+        </profile>
+        -->
+    </profiles>
+
+    <!-- activeProfiles
+     | List of profiles that are active for all builds.
+     |
+    <activeProfiles>
+      <activeProfile>alwaysActiveProfile</activeProfile>
+      <activeProfile>anotherAlwaysActiveProfile</activeProfile>
+    </activeProfiles>
+    -->
+</settings>
diff --git a/agiledancers-be/pom.xml b/agiledancers-be/pom.xml
new file mode 100644
index 0000000..477cbba
--- /dev/null
+++ b/agiledancers-be/pom.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>nl.agilecc.agiledancers</groupId>
+        <artifactId>agiledancers</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>agiledancers-be</artifactId>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.google.ortools</groupId>
+            <artifactId>ortools-java</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/Main.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/Main.java
new file mode 100644
index 0000000..00ddbb4
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/Main.java
@@ -0,0 +1,17 @@
+package nl.agilecc.agiledancers;
+
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
+        // to see how IntelliJ IDEA suggests fixing it.
+        System.out.printf("Hello and welcome!");
+
+        for (int i = 1; i <= 5; i++) {
+            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
+            System.out.println("i = " + i);
+        }
+    }
+}
\ No newline at end of file
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Coach.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Coach.java
new file mode 100644
index 0000000..f008c3c
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Coach.java
@@ -0,0 +1,6 @@
+package nl.agilecc.agiledancers.model;
+
+public class Coach {
+    private Long id;
+    private String name;
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DanceGroup.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DanceGroup.java
new file mode 100644
index 0000000..5914190
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DanceGroup.java
@@ -0,0 +1,17 @@
+package nl.agilecc.agiledancers.model;
+
+import nl.agilecc.agiledancers.model.specifications.DanceGroupStyle;
+import nl.agilecc.agiledancers.model.specifications.DanceGroupType;
+
+import java.util.Set;
+
+public class DanceGroup {
+    private Long id;
+    private String category;
+    private DanceGroupType type;
+    private int startAge;
+    private int endAge;
+    private Set<Dancer> dancers;
+    private Set<DanceGroupStyle> styles;
+    private Coach coach;
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Dancer.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Dancer.java
new file mode 100644
index 0000000..5b3dfec
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Dancer.java
@@ -0,0 +1,7 @@
+package nl.agilecc.agiledancers.model;
+
+public class Dancer {
+    private Long id;
+    private String name;
+    private int age;
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DayPart.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DayPart.java
new file mode 100644
index 0000000..ba068f5
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/DayPart.java
@@ -0,0 +1,12 @@
+package nl.agilecc.agiledancers.model;
+
+import nl.agilecc.agiledancers.model.specifications.DayPartType;
+
+import java.util.List;
+
+public class DayPart {
+    private Long id;
+
+    private DayPartType type;
+    private List<DanceGroup> danceGroups;
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Show.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Show.java
new file mode 100644
index 0000000..b23a772
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/Show.java
@@ -0,0 +1,8 @@
+package nl.agilecc.agiledancers.model;
+
+import java.util.List;
+
+public class Show {
+    private Long id;
+    private List<DayPart> dayParts;
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupStyle.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupStyle.java
new file mode 100644
index 0000000..daa408c
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupStyle.java
@@ -0,0 +1,5 @@
+package nl.agilecc.agiledancers.model.specifications;
+
+public enum DanceGroupStyle {
+    HIPHOP, JAZZ, MODERN, STREETDANCE, CLASSIC, BREAKDANCE
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupType.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupType.java
new file mode 100644
index 0000000..0c494ae
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DanceGroupType.java
@@ -0,0 +1,18 @@
+package nl.agilecc.agiledancers.model.specifications;
+
+import lombok.Getter;
+
+public enum DanceGroupType {
+    SHOW_CASE(3),
+    PRE_EDUCATION(1), // TODO check if this is one group mentioned with different docent each time, or three different groups - and thus if they are required 1 day or 3
+    SELECTION(2),
+    REGULAR(2),
+    PRE_SCHOOLER(1);
+
+    @Getter
+    private int dayPartsRequired;
+
+    DanceGroupType(int dayPartsRequired) {
+        this.dayPartsRequired = dayPartsRequired;
+    }
+}
diff --git a/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DayPartType.java b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DayPartType.java
new file mode 100644
index 0000000..7bfdefa
--- /dev/null
+++ b/agiledancers-be/src/main/java/nl/agilecc/agiledancers/model/specifications/DayPartType.java
@@ -0,0 +1,5 @@
+package nl.agilecc.agiledancers.model.specifications;
+
+public enum DayPartType {
+    MORNING, AFTERNOON, EVENING;
+}
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..eb10361
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>nl.agilecc.agiledancers</groupId>
+    <artifactId>agiledancers</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <name>Agile Dancers</name>
+    <description>To map multiple dance groups to multiple dance performance dayparts with respect to certain constraints.</description>
+
+    <modules>
+        <module>agiledancers-be</module>
+    </modules>
+
+    <!-- TODO Add SCM ??? -->
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+
+        <ortools-java.version>9.12.4544</ortools-java.version>
+        <lombok.version>1.18.38</lombok.version>
+    </properties>
+
+    <!-- dependencies that can be included by child-project - without stating the version -->
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>com.google.ortools</groupId>
+                <artifactId>ortools-java</artifactId>
+                <version>${ortools-java.version}</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <!-- dependencies that will always be included by the child-project -->
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+        </dependency>
+    </dependencies>
+
+</project>
\ No newline at end of file