Preconditions with better stacktraces for crash reporting tools. Credits to @pyricau. More info at http://www.slideshare.net/pyricau/crash-fast-furious

Preconditions.java

public class Preconditions {
    public static <T> T checkNotNull(T t, String name) {
        if (t == null) {
            throw withPreconditionsTraceRemoved(new NullPointerException(name + " must not be null"));
        }

        return t;
    }

    public static <T extends CharSequence> T nonBlank(T value, String name) {
        if (isBlank(value)) {
            throw withPreconditionsTraceRemoved(new IllegalArgumentException(name + " must not be blank"));
        }

        return value;
    }

    private static <T extends CharSequence> boolean isBlank(T value) {
        if (value == null || value.length() == 0)
            return true;

        for (int i = 0; i < value.length(); i++) {
            if (!Character.isWhitespace(value.charAt(i))) {
                return false;
            }
        }

        return true;
    }

    private static <T extends Exception> T withPreconditionsTraceRemoved(T exception) {
        StackTraceElement[] sourceStack = exception.getStackTrace();

        StackTraceElement[] updatedStack = new StackTraceElement[sourceStack.length - 1];
        System.arraycopy(sourceStack, 1, updatedStack, 0, updatedStack.length);

        exception.setStackTrace(updatedStack);

        return exception;
    }
}