Refactor for Java 1.8

- Clean up and refactor code

- Add 1.8 features

- Clean up IntelliJ inspector warnings

src/main/java/com/loomcom/symon/util/FifoRingBuffer.java

@@ -38,7 +38,7 @@ public class FifoRingBuffer<E> implements Iterable<E> {
     private int maxLength;
 
     public FifoRingBuffer(int maxLength) {
-        this.fifoBuffer = new LinkedList<E>();
+        this.fifoBuffer = new LinkedList<>();
         this.maxLength = maxLength;
     }
 

src/main/java/com/loomcom/symon/util/HexUtil.java

@@ -121,9 +121,6 @@ public class HexUtil {
      * @return Four digit, zero padded hexadecimal string.
      */
     public static String wordToHex(int val) {
-        StringBuilder sb = new StringBuilder(4);
-        sb.append(HEX_CONSTANTS[(val >> 8) & 0xff]);
-        sb.append(HEX_CONSTANTS[val & 0xff]);
-        return sb.toString();
+        return HEX_CONSTANTS[(val >> 8) & 0xff] + HEX_CONSTANTS[val & 0xff];
     }
 }