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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.tomcat.catalina</groupId>
  <artifactId>LoadExternalPropertiesListener</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>LoadExternalPropertiesListener extension for Tomcat</name>
  <properties>
      <tomcat.version>9.0.36</tomcat.version>
  </properties>
  <dependencies>
      <dependency>
         <groupId>org.apache.tomcat</groupId>
         <artifactId>tomcat-catalina</artifactId>
         <version>${tomcat.version}</version>
         <scope>provided</scope>
      </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>