A general Maven configuration that can be used for projects with ANTLR 4 grammars. This configuration works great in NetBeans, but additional configuration may be required for use in Eclipse.

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>org.yourgroup</groupId>
  <artifactId>yourartifact</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>YourProjectName</name>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <antlr4.visitor>true</antlr4.visitor>
    <antlr4.listener>true</antlr4.listener>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.antlr</groupId>
      <artifactId>antlr4-runtime</artifactId>
      <version>4.1</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

  <build>
    <sourceDirectory>src</sourceDirectory>
    <outputDirectory>bin</outputDirectory>

    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
          <source>6</source>
          <target>6</target>
          <showWarnings>true</showWarnings>
          <showDeprecation>true</showDeprecation>
          <compilerArguments>
            <Xlint />
          </compilerArguments>
        </configuration>
      </plugin>

      <plugin>
        <groupId>org.antlr</groupId>
        <artifactId>antlr4-maven-plugin</artifactId>
        <version>4.1</version>
        <configuration>
          <sourceDirectory>src</sourceDirectory>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>antlr4</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

    </plugins>
  </build>
</project>