BatchUpdateException not thrown as expected

When a batched update includes an insert entry with a PK for a row that already exists, the executeBatch() invocation does not throw a BatchUpdateException as I had expected - instead it throws a java.sql.SQLIntegrityConstraintViolationException.

DB Info:
DatabaseProductName = MySQL
DatabaseProductVersion = 5.5.31-MariaDB
DriverName = mariadb-jdbc
DriverVersion = 1.2
Driver supports batching = true

Observed Exception from the attached unittest:
java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '200' for key 'PRIMARY'
at org.mariadb.jdbc.internal.SQLExceptionMapper.get(SQLExceptionMapper.java:132)
at org.mariadb.jdbc.internal.SQLExceptionMapper.throwException(SQLExceptionMapper.java:106)
at org.mariadb.jdbc.MySQLPreparedStatement.executeBatch(MySQLPreparedStatement.java:198)
at jag.tests.MariaDBTest.testExceptionSingleBatchedRow(MariaDBTest.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.mariadb.jdbc.internal.common.QueryException: Duplicate entry '200' for key 'PRIMARY'
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.getResult(MySQLProtocol.java:858)
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.executeQuery(MySQLProtocol.java:907)
at org.mariadb.jdbc.internal.mysql.MySQLProtocol.executeQuery(MySQLProtocol.java:808)
at org.mariadb.jdbc.internal.common.DefaultParameterizedBatchHandler.executeBatch(DefaultParameterizedBatchHandler.java:77)
at org.mariadb.jdbc.MySQLPreparedStatement.executeBatch(MySQLPreparedStatement.java:196)
... 26 more