jsonschema2pojo is not creating generated java object

Question

I'm trying to use jsonschema2pojo to convert the FHIR schema to a java object. If I use this example schema then the generated java classes are create just fine, but when I use this Json Schema then nothing is created and I don't see any errors to understand why its not created. Can anybody help me understand where the failure is?

My pom file

<?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>org.example</groupId>
<artifactId>DMSAdpater</artifactId>
<version>1.0-SNAPSHOT</version>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>

        <plugin>
            <groupId>org.jsonschema2pojo</groupId>
            <artifactId>jsonschema2pojo-maven-plugin</artifactId>
            <version>1.0.2</version>
            <configuration>
                <sourceDirectory>${basedir}/src/main/resources/schema</sourceDirectory>
                <targetPackage>com.example.types</targetPackage>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<dependencies>
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.5.4</version>
    </dependency>
</dependencies>

The Output of my mvn compile

[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.example:DMSAdpater:jar:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 13, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] -----------------------< org.example:DMSAdpater >-----------------------
[INFO] Building DMSAdpater 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ DMSAdpater ---
[INFO] Deleting H:\Workspaces\HDI\Project\DMS_Adapter\target
[INFO]
[INFO] --- jsonschema2pojo-maven-plugin:1.0.2:generate (default) @ DMSAdpater ---
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ DMSAdpater ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 11 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ DMSAdpater ---
[INFO] Nothing to compile - all classes are up to date
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  25.745 s
[INFO] Finished at: 2020-07-13T12:01:07-04:00
[INFO] ------------------------------------------------------------------------