Fixed javadoc warnings (#159)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/ibftmessagedata/IbftUnsignedPrepareMessageData.java

@@ -22,7 +22,6 @@ public class IbftUnsignedPrepareMessageData extends AbstractIbftUnsignedInRoundM
   private static final int TYPE = IbftV2.PREPARE;
   private final Hash digest;
 
-  /** Constructor used when a validator wants to send a message */
   public IbftUnsignedPrepareMessageData(
       final ConsensusRoundIdentifier roundIdentifier, final Hash digest) {
     super(roundIdentifier);

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/ibftmessagedata/IbftUnsignedRoundChangeMessageData.java

@@ -29,7 +29,6 @@ public class IbftUnsignedRoundChangeMessageData extends AbstractIbftUnsignedMess
   // The validator may not hae any prepared certificate
   private final Optional<IbftPreparedCertificate> preparedCertificate;
 
-  /** Constructor used only by the {@link #readFrom(RLPInput)} method */
   public IbftUnsignedRoundChangeMessageData(
       final ConsensusRoundIdentifier roundIdentifier,
       final Optional<IbftPreparedCertificate> preparedCertificate) {

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/protocol/IbftProtocolManager.java

@@ -38,7 +38,7 @@ public class IbftProtocolManager implements ProtocolManager {
    * Constructor for the ibft protocol manager
    *
    * @param ibftEventQueue Entry point into the ibft event processor
-   * @param peers
+   * @param peers iBFT network peers
    */
   public IbftProtocolManager(final IbftEventQueue ibftEventQueue, final IbftNetworkPeers peers) {
     this.ibftEventQueue = ibftEventQueue;

ethereum/core/src/main/java/tech/pegasys/pantheon/ethereum/core/Util.java

@@ -38,6 +38,10 @@ public class Util {
   /**
    * Implements a fast version of ceiling(numerator/denominator) that does not require using
    * floating point math
+   *
+   * @param numerator Numerator
+   * @param denominator Denominator
+   * @return result of ceiling(numerator/denominator)
    */
   public static int fastDivCeiling(final int numerator, final int denominator) {
     return ((numerator - 1) / denominator) + 1;