Convert to multi-module project

.gitignore

@@ -1,2 +1,5 @@
-/target/
-/.settings/
+# Maven build directories
+target/
+
+# Eclipse settings directories
+.settings/

.project

@@ -5,11 +5,6 @@
 	<projects>
 	</projects>
 	<buildSpec>
-		<buildCommand>
-			<name>org.eclipse.jdt.core.javabuilder</name>
-			<arguments>
-			</arguments>
-		</buildCommand>
 		<buildCommand>
 			<name>org.eclipse.m2e.core.maven2Builder</name>
 			<arguments>
@@ -17,7 +12,6 @@
 		</buildCommand>
 	</buildSpec>
 	<natures>
-		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 	</natures>
 </projectDescription>

core/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>undo-redo-core</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

core/pom.xml

@@ -0,0 +1,15 @@
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>undo-redo-core</artifactId>
+	<name>Undo-Redo Core</name>
+	
+	<parent>
+		<groupId>dev.kske</groupId>
+		<artifactId>undo-redo</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+	</parent>
+
+</project>

pom.xml

@@ -6,10 +6,15 @@
 	<groupId>dev.kske</groupId>
 	<artifactId>undo-redo</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
+	<packaging>pom</packaging>
 
 	<name>Undo-Redo</name>
 	<description>A Java library for managing changes in an editor history.</description>
 	<url>https://git.kske.dev/kske/event-bus</url>
+	
+	<modules>
+		<module>core</module>
+	</modules>
 
 	<licenses>
 		<license>
@@ -169,7 +174,8 @@
 					<argLine>--add-opens dev.kske.undoredo/dev.kske.undoredo=ALL-UNNAMED</argLine>
 				</configuration>
 			</plugin>
-			
+
 		</plugins>
 	</build>
 </project>
+