Set up maven architecture

pom.xml

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+<?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>no.ntnu.pvv.henrkgr</groupId>
+    <artifactId>doorbell-matrix-bot</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <repositories>
+        <repository>
+            <id>sonatype</id>
+            <url>https://central.sonatype.com/artifact/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.cosium.matrix_communication_client</groupId>
+            <artifactId>matrix-communication-client</artifactId>
+            <version>${1.9.0}</version>
+        </dependency>
+    </dependencies>
+    
+</project>

src/main/java/no/ntnu/pvv/henrkgr/doorbellmatrixbot/Main.java

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+package no.ntnu.pvv.henrkgr.doorbellmatrixbot;
+
+public class Main {
+	public static void main(String[] args) {
+		System.out.println("Hello world");
+	}
+}