SchematicSystem/SchematicSystem_Main/pom.xml

<?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>steamwar</groupId>
        <artifactId>SchematicSystem</artifactId>
        <version>1.0</version>
    </parent>

    <properties>
        <main.basedir>${project.basedir}/..</main.basedir>
    </properties>

    <artifactId>SchematicSystem_Main</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>

    <build>
        <sourceDirectory>src</sourceDirectory>
        <resources>
            <resource>
                <directory>src</directory>
                <excludes>
                    <exclude>**/*.java</exclude>
                    <exclude>**/*.kt</exclude>
                </excludes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <finalName>schematicsystem</finalName>
    </build>

    <dependencies>
        <dependency>
            <groupId>steamwar</groupId>
            <artifactId>Spigot</artifactId>
            <version>1.15</version>
            <scope>system</scope>
            <systemPath>${main.basedir}/lib/Spigot-1.15.jar</systemPath>
        </dependency>
        <dependency>
            <groupId>steamwar</groupId>
            <artifactId>SchematicSystem_15</artifactId>
            <version>1.0</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>steamwar</groupId>
            <artifactId>SchematicSystem_12</artifactId>
            <version>1.0</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>steamwar</groupId>
            <artifactId>SchematicSystem_API</artifactId>
            <version>1.0</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
</project>