Unsupported major.minor version 51.0

Hello. I am trying to set up a development environment in Ubuntu 14.04. I did the git clone, but when doing the mvn clean package I get a series of errors that seem to indicate that there is an incorrect version of a file present. Pasted below is the part of the logging that contains the errors, but I believe this might be the pertinent part:

[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format (default) on project radiology-api: Execution default of goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format failed: Unable to load the mojo 'format' in the plugin 'com.marvinformatics.formatter:formatter-maven-plugin:1.6.0' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: com/marvinformatics/formatter/FormatterMojo : Unsupported major.minor version 51.0

Below is all the errors in the log. Thanks for your help.

[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ radiology-api ---
[INFO] 
[INFO] --- jacoco-maven-plugin:0.7.5.201505241946:prepare-agent (prepare-agent) @ radiology-api ---
[INFO] argLine set to -javaagent:/home/hb/.m2/repository/org/jacoco/org.jacoco.agent/0.7.5.201505241946/org.jacoco.agent-0.7.5.201505241946-runtime.jar=destfile=/home/hb/dev/openmrs-module-radiology/api/target/jacoco.exec
[INFO] 
[INFO] --- formatter-maven-plugin:1.6.0:format (default) @ radiology-api ---
Jun 9, 2016 4:59:10 AM org.sonatype.guice.bean.reflect.Logs$JULSink warn
WARNING: Error injecting: com.marvinformatics.formatter.FormatterMojo
java.lang.TypeNotPresentException: Type com.marvinformatics.formatter.FormatterMojo not present
    at org.sonatype.guice.bean.reflect.URLClassSpace.loadClass(URLClassSpace.java:109)
    at org.sonatype.guice.bean.reflect.NamedClass.load(NamedClass.java:45)
    at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45)
    at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52)
    at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
    at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108)
    at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
    at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
    at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:990)
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1036)
    at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:986)
    at com.google.inject.Scopes$1$1.get(Scopes.java:59)
    at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83)
    at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:92)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    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:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    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:622)
    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)
Caused by: java.lang.UnsupportedClassVersionError: com/marvinformatics/formatter/FormatterMojo : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389)
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
    at org.sonatype.guice.bean.reflect.URLClassSpace.loadClass(URLClassSpace.java:101)
    ... 41 more
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Radiology ......................................... SUCCESS [2.586s]
[INFO] Radiology API ..................................... FAILURE [36.839s]
[INFO] Radiology OMOD .................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 41.871s
[INFO] Finished at: Thu Jun 09 04:59:10 EDT 2016
[INFO] Final Memory: 14M/34M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format (default) on project radiology-api: Execution default of goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format failed: Unable to load the mojo 'format' in the plugin 'com.marvinformatics.formatter:formatter-maven-plugin:1.6.0' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: com/marvinformatics/formatter/FormatterMojo : Unsupported major.minor version 51.0
[ERROR] -----------------------------------------------------
[ERROR] realm =    plugin>com.marvinformatics.formatter:formatter-maven-plugin:1.6.0
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/formatter-maven-plugin/1.6.0/formatter-maven-plugin-1.6.0.jar
[ERROR] urls[1] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/support/1.6.0/support-1.6.0.jar
[ERROR] urls[2] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/jdt-core/1.6.0/jdt-core-1.6.0.jar
[ERROR] urls[3] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/jsdt-core/1.6.0/jsdt-core-1.6.0.jar
[ERROR] urls[4] = file:/home/hb/.m2/repository/commons-digester/commons-digester/2.0/commons-digester-2.0.jar
[ERROR] urls[5] = file:/home/hb/.m2/repository/commons-beanutils/commons-beanutils/1.8.0/commons-beanutils-1.8.0.jar
[ERROR] urls[6] = file:/home/hb/.m2/repository/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.jar
[ERROR] urls[7] = file:/home/hb/.m2/repository/com/google/guava/guava/18.0/guava-18.0.jar
[ERROR] urls[8] = file:/home/hb/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.22/plexus-utils-3.0.22.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] *http*://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :radiology-api
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ /sec)
bash: syntax error near unexpected token `)'
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Downloaded: *http*://mavenrepo.openmrs.org/nexus/content/repositories/public/org/openmrs/module/serialization.xstream-api-1.9/0.2.11/serialization.xstream-api-1.9-0.2.11.jar (4 KB at 12.2 KB/sec)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Downloaded: *http*://mavenrepo.openmrs.org/nexus/content/repositories/public/org/openmrs/module/serialization.xstream-api-1.10/0.2.11/serialization.xstream-api-1.10-0.2.11.jar (2 KB at 8.7 KB/sec)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Downloaded: *http*://mavenrepo.openmrs.org/nexus/content/repositories/public/org/openmrs/module/reportingcompatibility-api/2.0.0-SNAPSHOT/reportingcompatibility-api-2.0.0-20160510.085404-2.jar (298 KB at 701.6 KB/sec)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Downloaded: *http*://mavenrepo.openmrs.org/nexus/content/repositories/public/net/sf/ehcache/ehcache/2.10.0/ehcache-2.10.0.jar (8701 KB at 990.2 KB/sec)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] 
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ radiology-api ---
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] 
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] --- jacoco-maven-plugin:0.7.5.201505241946:prepare-agent (prepare-agent) @ radiology-api ---
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] argLine set to -javaagent:/home/hb/.m2/repository/org/jacoco/org.jacoco.agent/0.7.5.201505241946/org.jacoco.agent-0.7.5.201505241946-runtime.jar=destfile=/home/hb/dev/openmrs-module-radiology/api/target/jacoco.exec
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] 
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] --- formatter-maven-plugin:1.6.0:format (default) @ radiology-api ---
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Jun 9, 2016 4:59:10 AM org.sonatype.guice.bean.reflect.Logs$JULSink warn
Jun: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ WARNING: Error injecting: com.marvinformatics.formatter.FormatterMojo
WARNING:: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ java.lang.TypeNotPresentException: Type com.marvinformatics.formatter.FormatterMojo not present
java.lang.TypeNotPresentException:: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.bean.reflect.URLClassSpace.loadClass(URLClassSpace.java:109)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.bean.reflect.NamedClass.load(NamedClass.java:45)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:990)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1036)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:986)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at com.google.inject.Scopes$1$1.get(Scopes.java:59)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:92)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.lang.reflect.Method.invoke(Method.java:622)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ Caused by: java.lang.UnsupportedClassVersionError: com/marvinformatics/formatter/FormatterMojo : Unsupported major.minor version 51.0
Caused: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.lang.ClassLoader.defineClass1(Native Method)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.security.AccessController.doPrivileged(Native Method)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ at org.sonatype.guice.bean.reflect.URLClassSpace.loadClass(URLClassSpace.java:101)
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ ... 41 more
...: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] ------------------------------------------------------------------------
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Reactor Summary:
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] 
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Radiology ......................................... SUCCESS [2.586s]
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Radiology API ..................................... FAILURE [36.839s]
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Radiology OMOD .................................... SKIPPED
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] ------------------------------------------------------------------------
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] BUILD FAILURE
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] ------------------------------------------------------------------------
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Total time: 41.871s
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Finished at: Thu Jun 09 04:59:10 EDT 2016
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] Final Memory: 14M/34M
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [INFO] ------------------------------------------------------------------------
[INFO]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] Failed to execute goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format (default) on project radiology-api: Execution default of goal com.marvinformatics.formatter:formatter-maven-plugin:1.6.0:format failed: Unable to load the mojo 'format' in the plugin 'com.marvinformatics.formatter:formatter-maven-plugin:1.6.0' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: com/marvinformatics/formatter/FormatterMojo : Unsupported major.minor version 51.0
bash: syntax error near unexpected token `('
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] -----------------------------------------------------
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] realm =    plugin>com.marvinformatics.formatter:formatter-maven-plugin:1.6.0
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[0] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/formatter-maven-plugin/1.6.0/formatter-maven-plugin-1.6.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[1] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/support/1.6.0/support-1.6.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[2] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/jdt-core/1.6.0/jdt-core-1.6.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[3] = file:/home/hb/.m2/repository/com/marvinformatics/formatter/jsdt-core/1.6.0/jsdt-core-1.6.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[4] = file:/home/hb/.m2/repository/commons-digester/commons-digester/2.0/commons-digester-2.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[5] = file:/home/hb/.m2/repository/commons-beanutils/commons-beanutils/1.8.0/commons-beanutils-1.8.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[6] = file:/home/hb/.m2/repository/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[7] = file:/home/hb/.m2/repository/com/google/guava/guava/18.0/guava-18.0.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] urls[8] = file:/home/hb/.m2/repository/org/codehaus/plexus/plexus-utils/3.0.22/plexus-utils-3.0.22.jar
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] Number of foreign imports: 1
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] 
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] -----------------------------------------------------
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] -> [Help 1]
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] 
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] 
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] [Help 1] *http*://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] 
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR] After correcting the problems, you can resume the build with the command
[ERROR]: command not found
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ [ERROR]   mvn <goals> -rf :radiology-api
bash: goals: No such file or directory
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ hb@hb-VirtualBox:~/dev/openmrs-module-radiology$ 
bash: hb@hb-VirtualBox:~/dev/openmrs-module-radiology$: No such file or directory
hb@hb-VirtualBox:~/dev/openmrs-module-radiology$

Your version of Java is incorrect. I’m not sure exactly what version is required for that class, but you’re going to need to use a different version.