Float functions - Throwing* variants

Added variants of the float primitive functions with support for checked
exception.

src/main/java/info/ebenoit/ebul/func/ThrowingDoubleToFloatFunction.java

@@ -0,0 +1,49 @@
+package info.ebenoit.ebul.func;
+
+
+/**
+ * This interface supports a {@link DoubleToFloatFunction} that can throw checked exceptions. Checked exceptions are
+ * transmitted using a {@link FunctionException} runtime exception.
+ *
+ * @author <a href="mailto:ebenoit@ebenoit.info">E. Benoît</a>
+ */
+@FunctionalInterface
+public interface ThrowingDoubleToFloatFunction
+		extends DoubleToFloatFunction
+{
+
+	/**
+	 * Applies this function to the given argument.
+	 *
+	 * @param t
+	 *            the argument
+	 * @return the result
+	 * @throws FunctionException
+	 *             if a checked exception occurs
+	 */
+	@Override
+	default float applyAsFloat( final double t )
+	{
+		try {
+			return this.throwingApplyAsFloat( t );
+		} catch ( final RuntimeException e ) {
+			throw e;
+		} catch ( final Throwable e ) {
+			throw new FunctionException( e );
+		}
+	}
+
+
+	/**
+	 * Applies this function to the given argument.
+	 *
+	 * @param t
+	 *            the argument
+	 * @return the result
+	 * @throws Throwable
+	 *             if a checked exception occurs
+	 */
+	public float throwingApplyAsFloat( double t )
+			throws Throwable;
+
+}