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JTrim Executor
There is a newer version: 2.0.7
package org.jtrim2.executor;

import java.util.Collection;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * @see ExecutorsEx#asUnstoppableExecutor(java.util.concurrent.ExecutorService)
 */
final class UnstoppableExecutor implements ExecutorService {
    private final ExecutorService executor;

    public UnstoppableExecutor(ExecutorService executor) {
        Objects.requireNonNull(executor, "executor");

        this.executor = executor;
    }

    @Override
    public void execute(Runnable command) {
        executor.execute(command);
    }

    @Override
    public Future submit(Runnable task) {
        return executor.submit(task);
    }

    @Override
    public  Future submit(Runnable task, T result) {
        return executor.submit(task, result);
    }

    @Override
    public  Future submit(Callable task) {
        return executor.submit(task);
    }

    @Override
    public List shutdownNow() {
        throw new UnsupportedOperationException(
                "This executor cannot be shutted down.");
    }

    @Override
    public void shutdown() {
        throw new UnsupportedOperationException(
                "This executor cannot be shutted down.");
    }

    @Override
    public boolean isTerminated() {
        return executor.isTerminated();
    }

    @Override
    public boolean isShutdown() {
        return executor.isShutdown();
    }

    @Override
    public  T invokeAny(
            Collection> tasks,
            long timeout,
            TimeUnit unit)
                throws InterruptedException, ExecutionException, TimeoutException {
        return executor.invokeAny(tasks, timeout, unit);
    }

    @Override
    public  T invokeAny(Collection> tasks)
            throws InterruptedException, ExecutionException {
        return executor.invokeAny(tasks);
    }

    @Override
    public  List> invokeAll(
            Collection> tasks,
            long timeout,
            TimeUnit unit)
                throws InterruptedException {
        return executor.invokeAll(tasks, timeout, unit);
    }

    @Override
    public  List> invokeAll(
            Collection> tasks)
                throws InterruptedException {
        return executor.invokeAll(tasks);
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit)
            throws InterruptedException {
        return executor.awaitTermination(timeout, unit);
    }

    @Override
    public String toString() {
        return "UnstoppableExecutor{" + executor + '}';
    }
}