diff --git a/pom.xml b/pom.xml
index d3f05d5..1841d9b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,6 +50,12 @@
             <version>${mockito.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.8.2</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
     <build>
         <pluginManagement>
diff --git a/src/main/java/hs/fulda/de/ci/exam/project/Airline.java b/src/main/java/hs/fulda/de/ci/exam/project/Airline.java
new file mode 100644
index 0000000..1a85b40
--- /dev/null
+++ b/src/main/java/hs/fulda/de/ci/exam/project/Airline.java
@@ -0,0 +1,39 @@
+package hs.fulda.de.ci.exam.project;
+
+import java.util.HashSet;
+
+public class Airline {
+    private String name;
+    private String code;
+    private HashSet<Flight> flights;
+
+    public Airline(String name, String code) {
+        this.name = name;
+        this.code = code;
+        this.flights = new HashSet<>();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public HashSet<Flight> getFlights() {
+        return flights;
+    }
+
+    public void addFlight(Flight flight) {
+        flights.add(flight);
+    }
+}
diff --git a/src/test/java/hs/fulda/de/ci/exam/project/AirlineTest.java b/src/test/java/hs/fulda/de/ci/exam/project/AirlineTest.java
new file mode 100644
index 0000000..4777567
--- /dev/null
+++ b/src/test/java/hs/fulda/de/ci/exam/project/AirlineTest.java
@@ -0,0 +1,51 @@
+package hs.fulda.de.ci.exam.project;
+
+import org.junit.jupiter.api.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import java.util.HashSet;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+@RunWith(MockitoJUnitRunner.class)
+public class AirlineTest {
+
+    Airline airline = new Airline("Pegasus", "1234");
+    Flight flight1 = mock(Flight.class);
+    HashSet<Flight> flights = new HashSet<>();
+
+    @Test
+    void testConstructorSetsNameParameterCorrectly() {
+        assertThat(airline.getName())
+                .describedAs("name of airline")
+                .isEqualTo("Pegasus");
+    }
+
+    @Test
+    void testConstructorSetsCodeParameterCorrectly() {
+        assertThat(airline.getCode())
+                .describedAs("code of airline")
+                .isEqualTo("1234");
+    }
+
+    @Test
+    void getFlightsReturnsEmptyListOfFlights() {
+        assertThat(airline.getFlights())
+                .describedAs("flights of airline")
+                .isEqualTo(flights);
+    }
+
+    @Test
+    void addFlightAddsFlightToListOfFlights() {
+        flights.add(flight1);
+
+        airline.addFlight(flight1);
+
+        assertThat(airline.getFlights())
+                .describedAs("flights of airline")
+                .isEqualTo(flights);
+    }
+
+}
diff --git a/target/AirlineManagementSystem-1.0-SNAPSHOT.jar b/target/AirlineManagementSystem-1.0-SNAPSHOT.jar
index 345bef8..f166720 100644
Binary files a/target/AirlineManagementSystem-1.0-SNAPSHOT.jar and b/target/AirlineManagementSystem-1.0-SNAPSHOT.jar differ
diff --git a/target/classes/hs/fulda/de/ci/exam/project/Person.class b/target/classes/hs/fulda/de/ci/exam/project/Person.class
index 4407f72..79140f2 100644
Binary files a/target/classes/hs/fulda/de/ci/exam/project/Person.class and b/target/classes/hs/fulda/de/ci/exam/project/Person.class differ
diff --git a/target/maven-archiver/pom.properties b/target/maven-archiver/pom.properties
index 72e7601..ca0dfcb 100644
--- a/target/maven-archiver/pom.properties
+++ b/target/maven-archiver/pom.properties
@@ -1,5 +1,5 @@
 #Generated by Maven
-#Mon Jan 24 12:13:24 CET 2022
+#Sat Jan 29 15:33:12 CET 2022
 groupId=hs.fulda.de.ci.exam.project
 artifactId=AirlineManagementSystem
 version=1.0-SNAPSHOT
diff --git a/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst b/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
index 4146c73..e6d23e5 100644
--- a/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
@@ -1 +1,4 @@
-hs/fulda/de/ci/exam/project/ExampleClass.class
+hs/fulda/de/ci/exam/project/FlightInstance.class
+hs/fulda/de/ci/exam/project/Airport.class
+hs/fulda/de/ci/exam/project/Address.class
+hs/fulda/de/ci/exam/project/Flight.class
diff --git a/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst b/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
index 764d565..eadb9ed 100644
--- a/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
@@ -1 +1,4 @@
-/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/main/java/hs/fulda/de/ci/exam/project/ExampleClass.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/main/java/hs/fulda/de/ci/exam/project/Airport.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/main/java/hs/fulda/de/ci/exam/project/Address.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/main/java/hs/fulda/de/ci/exam/project/FlightInstance.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/main/java/hs/fulda/de/ci/exam/project/Flight.java
diff --git a/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst b/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst
index 2a3e81d..c17a6a7 100644
--- a/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst
@@ -1 +1,3 @@
-hs/fulda/de/ci/exam/project/ExampleClassTest.class
+hs/fulda/de/ci/exam/project/AddressTest.class
+hs/fulda/de/ci/exam/project/FlightTest.class
+hs/fulda/de/ci/exam/project/AirportTest.class
diff --git a/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst b/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst
index 09bf98c..f230483 100644
--- a/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst
+++ b/target/maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst
@@ -1,2 +1,3 @@
-/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/test/java/hs/fulda/de/ci/exam/project/ExampleClassTest.java
-/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/test/java/TestExample.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/test/java/hs/fulda/de/ci/exam/project/FlightTest.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/test/java/hs/fulda/de/ci/exam/project/AirportTest.java
+/Users/imron/Library/CloudStorage/OneDrive-lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/src/test/java/hs/fulda/de/ci/exam/project/AddressTest.java
diff --git a/target/surefire-reports/TEST-TestExample.xml b/target/surefire-reports/TEST-TestExample.xml
deleted file mode 100644
index 38e33bc..0000000
--- a/target/surefire-reports/TEST-TestExample.xml
+++ /dev/null
@@ -1,63 +0,0 @@
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\ No newline at end of file
diff --git a/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.ExampleClassTest.xml b/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.ExampleClassTest.xml
deleted file mode 100644
index bbddb48..0000000
--- a/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.ExampleClassTest.xml
+++ /dev/null
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-    <property name="java.version.date" value="2021-07-20"/>
-    <property name="java.home" value="/Library/Java/JavaVirtualMachines/temurin-11.jdk/Contents/Home"/>
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-    <property name="basedir" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem"/>
-    <property name="java.vm.compressedOopsMode" value="Zero based"/>
-    <property name="line.separator" value="&#10;"/>
-    <property name="java.specification.name" value="Java Platform API Specification"/>
-    <property name="java.vm.specification.vendor" value="Oracle Corporation"/>
-    <property name="java.awt.graphicsenv" value="sun.awt.CGraphicsEnvironment"/>
-    <property name="surefire.real.class.path" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/surefire/surefirebooter8074228803494332656.jar"/>
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-    <property name="localRepository" value="/Users/imron/.m2/repository"/>
-    <property name="java.vendor.url.bug" value="https://github.com/adoptium/adoptium-support/issues"/>
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-    <property name="idea.version" value="2021.3.1"/>
-    <property name="java.version" value="11.0.12"/>
-    <property name="user.dir" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem"/>
-    <property name="os.arch" value="x86_64"/>
-    <property name="java.vm.specification.name" value="Java Virtual Machine Specification"/>
-    <property name="java.awt.printerjob" value="sun.lwawt.macosx.CPrinterJob"/>
-    <property name="sun.os.patch.level" value="unknown"/>
-    <property name="java.library.path" value="/Users/imron/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:."/>
-    <property name="java.vm.info" value="mixed mode"/>
-    <property name="java.vendor" value="Eclipse Foundation"/>
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-    <property name="sun.io.unicode.encoding" value="UnicodeBig"/>
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-  <testcase name="testExampleClass" classname="hs.fulda.de.ci.exam.project.ExampleClassTest" time="0.013"/>
-</testsuite>
\ No newline at end of file
diff --git a/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.TestExampleClass.xml b/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.TestExampleClass.xml
deleted file mode 100644
index 692684a..0000000
--- a/target/surefire-reports/TEST-hs.fulda.de.ci.exam.project.TestExampleClass.xml
+++ /dev/null
@@ -1,62 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<testsuite xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://maven.apache.org/surefire/maven-surefire-plugin/xsd/surefire-test-report.xsd" name="hs.fulda.de.ci.exam.project.TestExampleClass" time="0.023" tests="1" errors="0" skipped="0" failures="0">
-  <properties>
-    <property name="gopherProxySet" value="false"/>
-    <property name="awt.toolkit" value="sun.lwawt.macosx.LWCToolkit"/>
-    <property name="java.specification.version" value="11"/>
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-    <property name="sun.jnu.encoding" value="UTF-8"/>
-    <property name="java.class.path" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/test-classes:/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/classes:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar:/Users/imron/.m2/repository/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar:/Users/imron/.m2/repository/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar:/Users/imron/.m2/repository/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar:/Users/imron/.m2/repository/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar:/Users/imron/.m2/repository/org/assertj/assertj-core/3.21.0/assertj-core-3.21.0.jar:/Users/imron/.m2/repository/org/mockito/mockito-core/4.1.0/mockito-core-4.1.0.jar:/Users/imron/.m2/repository/net/bytebuddy/byte-buddy/1.12.1/byte-buddy-1.12.1.jar:/Users/imron/.m2/repository/net/bytebuddy/byte-buddy-agent/1.12.1/byte-buddy-agent-1.12.1.jar:/Users/imron/.m2/repository/org/objenesis/objenesis/3.2/objenesis-3.2.jar:/Users/imron/.m2/repository/org/mockito/mockito-junit-jupiter/4.1.0/mockito-junit-jupiter-4.1.0.jar:"/>
-    <property name="java.vm.vendor" value="Eclipse Foundation"/>
-    <property name="sun.arch.data.model" value="64"/>
-    <property name="java.vendor.url" value="https://adoptium.net/"/>
-    <property name="user.timezone" value=""/>
-    <property name="java.vm.specification.version" value="11"/>
-    <property name="os.name" value="Mac OS X"/>
-    <property name="sun.java.launcher" value="SUN_STANDARD"/>
-    <property name="user.country" value="GB"/>
-    <property name="sun.boot.library.path" value="/Library/Java/JavaVirtualMachines/temurin-11.jdk/Contents/Home/lib"/>
-    <property name="sun.java.command" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/surefire/surefirebooter2136516617371735560.jar /Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/surefire 2022-01-24T12-26-38_824-jvmRun1 surefire13539754851733994117tmp surefire_015090886908496297244tmp"/>
-    <property name="jdk.debug" value="release"/>
-    <property name="surefire.test.class.path" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/test-classes:/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/classes:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-engine/5.8.1/junit-jupiter-engine-5.8.1.jar:/Users/imron/.m2/repository/org/junit/platform/junit-platform-engine/1.8.1/junit-platform-engine-1.8.1.jar:/Users/imron/.m2/repository/org/opentest4j/opentest4j/1.2.0/opentest4j-1.2.0.jar:/Users/imron/.m2/repository/org/junit/platform/junit-platform-commons/1.8.1/junit-platform-commons-1.8.1.jar:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-api/5.8.1/junit-jupiter-api-5.8.1.jar:/Users/imron/.m2/repository/org/apiguardian/apiguardian-api/1.1.2/apiguardian-api-1.1.2.jar:/Users/imron/.m2/repository/org/junit/jupiter/junit-jupiter-params/5.8.1/junit-jupiter-params-5.8.1.jar:/Users/imron/.m2/repository/org/assertj/assertj-core/3.21.0/assertj-core-3.21.0.jar:/Users/imron/.m2/repository/org/mockito/mockito-core/4.1.0/mockito-core-4.1.0.jar:/Users/imron/.m2/repository/net/bytebuddy/byte-buddy/1.12.1/byte-buddy-1.12.1.jar:/Users/imron/.m2/repository/net/bytebuddy/byte-buddy-agent/1.12.1/byte-buddy-agent-1.12.1.jar:/Users/imron/.m2/repository/org/objenesis/objenesis/3.2/objenesis-3.2.jar:/Users/imron/.m2/repository/org/mockito/mockito-junit-jupiter/4.1.0/mockito-junit-jupiter-4.1.0.jar:"/>
-    <property name="sun.cpu.endian" value="little"/>
-    <property name="user.home" value="/Users/imron"/>
-    <property name="user.language" value="en"/>
-    <property name="java.specification.vendor" value="Oracle Corporation"/>
-    <property name="java.version.date" value="2021-07-20"/>
-    <property name="java.home" value="/Library/Java/JavaVirtualMachines/temurin-11.jdk/Contents/Home"/>
-    <property name="file.separator" value="/"/>
-    <property name="basedir" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem"/>
-    <property name="java.vm.compressedOopsMode" value="Zero based"/>
-    <property name="line.separator" value="&#10;"/>
-    <property name="java.specification.name" value="Java Platform API Specification"/>
-    <property name="java.vm.specification.vendor" value="Oracle Corporation"/>
-    <property name="java.awt.graphicsenv" value="sun.awt.CGraphicsEnvironment"/>
-    <property name="surefire.real.class.path" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem/target/surefire/surefirebooter2136516617371735560.jar"/>
-    <property name="sun.management.compiler" value="HotSpot 64-Bit Tiered Compilers"/>
-    <property name="java.runtime.version" value="11.0.12+7"/>
-    <property name="user.name" value="imron"/>
-    <property name="path.separator" value=":"/>
-    <property name="os.version" value="11.1"/>
-    <property name="java.runtime.name" value="OpenJDK Runtime Environment"/>
-    <property name="file.encoding" value="UTF-8"/>
-    <property name="java.vm.name" value="OpenJDK 64-Bit Server VM"/>
-    <property name="java.vendor.version" value="Temurin-11.0.12+7"/>
-    <property name="localRepository" value="/Users/imron/.m2/repository"/>
-    <property name="java.vendor.url.bug" value="https://github.com/adoptium/adoptium-support/issues"/>
-    <property name="java.io.tmpdir" value="/var/folders/q8/1t6qjhh97rnbw4mjxv9d4nv40000gr/T/"/>
-    <property name="java.version" value="11.0.12"/>
-    <property name="user.dir" value="/Users/imron/OneDrive - lt.hs-fulda.de/Desktop/Semester_7_HSF/CI/AirlineManagementSystem"/>
-    <property name="os.arch" value="x86_64"/>
-    <property name="java.vm.specification.name" value="Java Virtual Machine Specification"/>
-    <property name="java.awt.printerjob" value="sun.lwawt.macosx.CPrinterJob"/>
-    <property name="sun.os.patch.level" value="unknown"/>
-    <property name="java.library.path" value="/Users/imron/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:."/>
-    <property name="java.vm.info" value="mixed mode"/>
-    <property name="java.vendor" value="Eclipse Foundation"/>
-    <property name="java.vm.version" value="11.0.12+7"/>
-    <property name="sun.io.unicode.encoding" value="UnicodeBig"/>
-    <property name="java.class.version" value="55.0"/>
-  </properties>
-  <testcase name="testExampleClass" classname="hs.fulda.de.ci.exam.project.TestExampleClass" time="0.017"/>
-</testsuite>
\ No newline at end of file
diff --git a/target/surefire-reports/TestExample.txt b/target/surefire-reports/TestExample.txt
deleted file mode 100644
index 0f318c5..0000000
--- a/target/surefire-reports/TestExample.txt
+++ /dev/null
@@ -1,4 +0,0 @@
--------------------------------------------------------------------------------
-Test set: TestExample
--------------------------------------------------------------------------------
-Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0 s - in TestExample
diff --git a/target/surefire-reports/hs.fulda.de.ci.exam.project.ExampleClassTest.txt b/target/surefire-reports/hs.fulda.de.ci.exam.project.ExampleClassTest.txt
deleted file mode 100644
index 3da405b..0000000
--- a/target/surefire-reports/hs.fulda.de.ci.exam.project.ExampleClassTest.txt
+++ /dev/null
@@ -1,4 +0,0 @@
--------------------------------------------------------------------------------
-Test set: hs.fulda.de.ci.exam.project.ExampleClassTest
--------------------------------------------------------------------------------
-Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.017 s - in hs.fulda.de.ci.exam.project.ExampleClassTest
diff --git a/target/surefire-reports/hs.fulda.de.ci.exam.project.TestExampleClass.txt b/target/surefire-reports/hs.fulda.de.ci.exam.project.TestExampleClass.txt
deleted file mode 100644
index b805685..0000000
--- a/target/surefire-reports/hs.fulda.de.ci.exam.project.TestExampleClass.txt
+++ /dev/null
@@ -1,4 +0,0 @@
--------------------------------------------------------------------------------
-Test set: hs.fulda.de.ci.exam.project.TestExampleClass
--------------------------------------------------------------------------------
-Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.023 s - in hs.fulda.de.ci.exam.project.TestExampleClass
diff --git a/target/test-classes/hs/fulda/de/ci/exam/project/PersonTest.class b/target/test-classes/hs/fulda/de/ci/exam/project/PersonTest.class
index cdb369d..3f5b4f6 100644
Binary files a/target/test-classes/hs/fulda/de/ci/exam/project/PersonTest.class and b/target/test-classes/hs/fulda/de/ci/exam/project/PersonTest.class differ