Resolves #2241 clean up javadoc warnings

jetty-client/src/main/java/org/eclipse/jetty/client/HttpClient.java

@@ -979,6 +979,8 @@ public class HttpClient extends ContainerLifeCycle
     /**
      * Gets the http compliance mode for parsing http responses.
      * The default http compliance level is {@link HttpCompliance#RFC7230} which is the latest HTTP/1.1 specification
+     *
+     * @return the HttpCompliance instance
      */
     public HttpCompliance getHttpCompliance()
     {

jetty-client/src/main/java/org/eclipse/jetty/client/util/BasicAuthentication.java

@@ -70,7 +70,7 @@ public class BasicAuthentication extends AbstractAuthentication
      * Basic authentication result.
      * <p>
      * Application may utilize this class directly via
-     * {@link org.eclipse.jetty.client.api.AuthenticationStore#addAuthenticationResult(Result)}
+     * {@link org.eclipse.jetty.client.api.AuthenticationStore#addAuthenticationResult(.Result)}
      * to perform preemptive authentication, that is immediately
      * sending the authorization header based on the fact that the
      * URI is known to require authentication and that username

jetty-osgi/jetty-osgi-boot-warurl/src/main/java/org/eclipse/jetty/osgi/boot/warurl/internal/WarURLConnection.java

@@ -53,6 +53,7 @@ public class WarURLConnection extends URLConnection
      * @param newmanifest The new manifest
      * @param rawIn The file input stream or equivalent. not the jar input stream.
      * @throws IOException if an I/O error occurs.
+     * @return InputStream of the replaced manifest file
      */
     public static InputStream substitueManifest(final Manifest newmanifest,
             final InputStream rawIn) throws IOException

jetty-server/src/main/java/org/eclipse/jetty/server/session/FileSessionDataStore.java

@@ -145,7 +145,8 @@ public class FileSessionDataStore extends AbstractSessionDataStore
      * @param filename name of the file containing the session's information
      * 
      * @return true if file was deleted, false otherwise
-     * @throws Exception
+     * @throws Exception indicating delete failure
+     *
      */
     public boolean deleteFile (String filename) throws Exception
     {
@@ -255,7 +256,7 @@ public class FileSessionDataStore extends AbstractSessionDataStore
      * @param now the time now in msec
      * @param p the file to check
      * 
-     * @throws Exception
+     * @throws Exception indicating error in sweep
      */
     public void sweepFile (long now, Path p)
     throws Exception
@@ -380,7 +381,7 @@ public class FileSessionDataStore extends AbstractSessionDataStore
      * be kept and the rest deleted. At the same time, any files - for any context -
      * that expired a long time ago will be cleaned up.
      * 
-     * @throws IllegalStateException if storeDir doesn't exist, isn't readable/writeable
+     * @throws Exception if storeDir doesn't exist, isn't readable/writeable
      * or contains 2 files with the same lastmodify time for the same session. Throws IOException
      * if the lastmodifytimes can't be read.
      */