SpigotCore/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>

    <groupId>steamwar</groupId>
    <artifactId>SpigotCore</artifactId>
    <version>2.0</version>
    <packaging>pom</packaging>
    <url>https://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <main.basedir>${project.basedir}</main.basedir>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
        <finalName>${project.name}</finalName>
    </build>

    <modules>
        <module>SpigotCore_API</module>
        <module>SpigotCore_8</module>
        <module>SpigotCore_9</module>
        <module>SpigotCore_10</module>
        <module>SpigotCore_12</module>
        <module>SpigotCore_14</module>
        <module>SpigotCore_15</module>
        <module>SpigotCore_Main</module>
    </modules>
</project>