JavaDoc fixes.

src/main/java/com/zaxxer/hikari/HikariConfig.java

@@ -448,7 +448,7 @@ public class HikariConfig implements HikariConfigMXBean
     * if the minimum number of connections cannot be created.
     *
     * @return whether or not initialization should fail on error immediately
-    * @deprecated see {@code #getInitializationFailTimeout()
+    * @deprecated see {@code #getInitializationFailTimeout()}
     */
    @Deprecated
    public boolean isInitializationFailFast()
@@ -461,7 +461,7 @@ public class HikariConfig implements HikariConfigMXBean
     * if the minimum number of connections cannot be created.
     *
     * @param failFast true if the pool should fail if the minimum connections cannot be created
-    * @deprecated see {@code #setInitializationFailTimeout(long)
+    * @deprecated see {@code #setInitializationFailTimeout(long)}
     */
    @Deprecated
    public void setInitializationFailFast(boolean failFast)

src/main/java/com/zaxxer/hikari/util/ClockSource.java

@@ -110,7 +110,7 @@ public interface ClockSource
 
    /**
     * Get the TimeUnit the ClockSource is denominated in.
-    * @return
+    * @return the internal TimeUnit used by the ClockSource
     */
    TimeUnit getSourceTimeUnit();
 

src/main/java/com/zaxxer/hikari/util/UtilityElf.java

@@ -37,7 +37,10 @@ import java.util.regex.Pattern;
 public final class UtilityElf
 {
    /**
+    * Check whether the provided String is empty or {@code null} and return a
+    * {@code null} in either case, otherwise return the trimmed String.
     *
+    * @param text the String to check for emptiness
     * @return null if string is null or empty
    */
    public static String getNullIfEmpty(final String text)