How to compile using -Xlint:unchecked in a Maven project?

I guess you can set compiler arguments in your pom.xml. Please refer this http://maven.apache.org/plugins/maven-compiler-plugin/examples/pass-compiler-arguments.html

 <compilerArgument>-Xlint:unchecked</compilerArgument>

I want to elaborate on @Nishant's answer. The compilerArgument tag needs to go inside plugin/configuration tag. Here is a full example:

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.3</version>
    <configuration>
      <source>1.8</source>
      <target>1.8</target>
      <testSource>1.8</testSource>
      <testTarget>1.8</testTarget>
      <compilerArgument>-Xlint:unchecked</compilerArgument>
    </configuration>
  </plugin>
</plugins>