getting this exception when trying to generate ddl

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.3:run (default) on project btc-market-entities: An Ant BuildException has occured: org.hibernate.MappingException: Unable to instantiate custom type: org.jadira.usertype.corejava.PersistentEnum
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.apache.maven.plugin.MojoExecutionException: An Ant BuildException has occured: org.hibernate.MappingException: Unable to instantiate custom type: org.jadira.usertype.corejava.PersistentEnum
at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:131)
at org.apache.maven.plugin.antrun.AntRunMojo.execute(AntRunMojo.java:98)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
... 25 more
Caused by: org.hibernate.MappingException: Unable to instantiate custom type: org.jadira.usertype.corejava.PersistentEnum
at org.hibernate.tool.ant.HibernateToolTask.reportException(HibernateToolTask.java:226)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:189)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
at org.apache.tools.ant.Task.perform(Task.java:364)
at org.apache.tools.ant.Target.execute(Target.java:341)
at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:118)
... 28 more
Caused by: org.hibernate.MappingException: Unable to instantiate custom type: org.jadira.usertype.corejava.PersistentEnum
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:193)
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:179)
at org.hibernate.type.TypeFactory.byClass(TypeFactory.java:103)
at org.hibernate.type.TypeResolver.heuristicType(TypeResolver.java:130)
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:295)
at org.hibernate.mapping.Column.getSqlTypeCode(Column.java:187)
at org.hibernate.mapping.Column.getSqlType(Column.java:227)
at org.hibernate.mapping.Table.sqlCreateString(Table.java:417)
at org.hibernate.cfg.Configuration.generateSchemaCreationScript(Configuration.java:1024)
at org.hibernate.tool.hbm2ddl.SchemaExport.(SchemaExport.java:126)
at org.hibernate.tool.hbm2x.Hbm2DDLExporter.doStart(Hbm2DDLExporter.java:165)
at org.hibernate.tool.hbm2x.AbstractExporter.start(AbstractExporter.java:95)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:40)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
... 32 more
Caused by: java.lang.NullPointerException
at org.jadira.usertype.corejava.PersistentEnum.setParameterValues(PersistentEnum.java:35)
at org.hibernate.type.TypeFactory.injectParameters(TypeFactory.java:131)
at org.hibernate.type.TypeFactory.custom(TypeFactory.java:189)
... 45 more

Maven plugin config
<plugins>
<plugin>
<!--<groupId>org.apache.maven.plugins</groupId>-->
maven-antrun-plugin
<!--<version>1.7</version>-->
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<configuration>
<tasks>
<property name="maven_test_classpath" refid="maven.test.classpath"/>
<path id="hibernate_tools_path">
<pathelement path="${maven_test_classpath}"/>
</path>
<property name="hibernate_tools_classpath" refid="hibernate_tools_path"/>
<echo message="hibernate_tools classpath: ${hibernate_tools_classpath}"/>
<taskdef name="hibernatetool" classname="org.hibernate.tool.ant.HibernateToolTask" classpathref="maven.plugin.classpath"/>
<mkdir dir="${project.build.directory}/generated-sources/hibernate"/>
<hibernatetool destdir="${project.build.directory}/generated-sources/hibernate">
<classpath refid="hibernate_tools_path"/>
<jpaconfiguration persistenceunit="marketPersistenceUnit"/>
<!--<hbm2ddl export="false" format="true" outputfilename="database.ddl"/>-->
<hbm2ddl

export="false"
outputfilename="database.ddl"
delimiter=";"
format="true"/>
</hibernatetool>
</tasks>
<detail>true</detail>
</configuration>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
hibernate-tools
<version>4.0.0-CR1</version>
<!--<exclusions>-->
<!--<exclusion>-->
<!--hibernate-commons-annotations-->
<!--<groupId>org.hibernate</groupId>-->
<!--</exclusion>-->
<!--</exclusions>-->
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
slf4j-simple
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
slf4j-api
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
joda-time
<version>${joda.time.version}</version>
</dependency>
<dependency>
<groupId>org.joda</groupId>
joda-money
<version>${joda-money.version}</version>
</dependency>
<dependency>
<groupId>org.jadira.usertype</groupId>
usertype.core
<version>3.1.0.CR10</version>
</dependency>
<dependency>
<groupId>org.jadira.cdt</groupId>
cdt
<version>3.1.0.CR10</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
postgresql
<version>${postgresql.driver.version}</version>
</dependency>
</dependencies>
</plugin>

field declaration

@Column(name = "ORDER_TYPE", nullable = false)
@Type(type = CustomTypes.ENUM)
private OrderType orderType;