pom.xml

<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>de.cardmarket4j</groupId>
	<artifactId>cardmarket4j</artifactId>
	<version>0.8.1</version>
	<name>cardmarket4j</name>

	<properties>
		<version.gson>(2.8.5, 2.9.0]</version.gson>
		<version.logback>1.2.3</version.logback>
		<version.nv-i18n>1.24</version.nv-i18n>


		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<maven.compiler.source>10</maven.compiler.source>
		<maven.compiler.target>10</maven.compiler.target>
	</properties>

	<dependencies>
		<dependency>
			<groupId>com.google.code.gson</groupId>
			<artifactId>gson</artifactId>
			<version>${version.gson}</version>
		</dependency>

		<dependency>
			<groupId>ch.qos.logback</groupId>
			<artifactId>logback-classic</artifactId>
			<version>${version.logback}</version>
		</dependency>

		<dependency>
			<groupId>com.neovisionaries</groupId>
			<artifactId>nv-i18n</artifactId>
			<version>${version.nv-i18n}</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>

			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.8.0</version>
			</plugin>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-shade-plugin</artifactId>
				<version>3.1.0</version>
				<executions>
					<!-- Run shade goal on package phase -->
					<execution>
						<phase>package</phase>
						<goals>
							<goal>shade</goal>
						</goals>
						<configuration>
							<transformers>
								<!-- add main class to manifest file -->
								<transformer
									implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
									<mainClass>de.cardmarket4j.Main</mainClass>
								</transformer>
							</transformers>
						</configuration>
					</execution>
				</executions>
			</plugin>

			<plugin>
				<artifactId>maven-resources-plugin</artifactId>
				<version>3.0.2</version>
				<executions>
					<execution>
						<id>copy-resources</id>
						<!-- here the phase you need -->
						<phase>validate</phase>
						<goals>
							<goal>copy-resources</goal>
						</goals>
						<configuration>
							<outputDirectory>${project.build.directory}/files</outputDirectory>
							<resources>
								<resource>
									<directory>${basedir}/files</directory>
								</resource>
							</resources>
						</configuration>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>
</project>