diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index 7df71eb..31e175c 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -9,6 +9,7 @@
     <inspection_tool class="BeforeOrAfterIsPublicVoidNoArg" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ConstantJUnitAssertArgument" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ExpectedExceptionNeverThrown" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="FindBugsIDEA" enabled="true" level="SERVER PROBLEM" enabled_by_default="true" />
     <inspection_tool class="IgnoredJUnitTest" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="JUnit3MethodNamingConvention" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="JUnit3StyleTestMethodInJUnit4Class" enabled="true" level="WARNING" enabled_by_default="true" />
@@ -50,7 +51,7 @@
     <inspection_tool class="TestMethodInProductCode" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="TestMethodIsPublicVoidNoArg" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="TestMethodWithoutAssertion" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="assertionMethods" value="org.junit.Assert,assert.*|fail.*,junit.framework.Assert,assert.*|fail.*,org.mockito.Mockito,verify.*,org.mockito.InOrder,verify,org.junit.rules.ExpectedException,expect.*,org.hamcrest.MatcherAssert,assertThat" />
+      <option name="assertionMethods" value="org.junit.Assert,assert.*|fail.*,junit.framework.Assert,assert.*|fail.*,org.mockito.Mockito,verify.*,org.mockito.InOrder,verify,org.junit.rules.ExpectedException,expect.*,org.hamcrest.MatcherAssert,assertThat,org.assertj.core.api.Assertions,assertThat,org.assertj.core.api.SoftAssertions,assertAll" />
       <option name="assertKeywordIsAssertion" value="false" />
     </inspection_tool>
     <inspection_tool class="UnconstructableTestCase" enabled="true" level="WARNING" enabled_by_default="true" />
diff --git a/node.iml b/node.iml
index b2d3a3d..bb89d96 100644
--- a/node.iml
+++ b/node.iml
@@ -16,4 +16,165 @@
     <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.assertj:assertj-core:3.4.1" level="project" />
   </component>
+  <component name="org.twodividedbyzero.idea.findbugs">
+    <option name="_detectors">
+      <map>
+        <entry key="AppendingToAnObjectOutputStream" value="true" />
+        <entry key="AtomicityProblem" value="true" />
+        <entry key="BadAppletConstructor" value="false" />
+        <entry key="BadResultSetAccess" value="true" />
+        <entry key="BadSyntaxForRegularExpression" value="true" />
+        <entry key="BadUseOfReturnValue" value="true" />
+        <entry key="BadlyOverriddenAdapter" value="true" />
+        <entry key="BooleanReturnNull" value="true" />
+        <entry key="BuildInterproceduralCallGraph" value="false" />
+        <entry key="BuildObligationPolicyDatabase" value="true" />
+        <entry key="CallToUnsupportedMethod" value="false" />
+        <entry key="CalledMethods" value="true" />
+        <entry key="CheckCalls" value="false" />
+        <entry key="CheckExpectedWarnings" value="false" />
+        <entry key="CheckImmutableAnnotation" value="true" />
+        <entry key="CheckTypeQualifiers" value="true" />
+        <entry key="CloneIdiom" value="true" />
+        <entry key="ComparatorIdiom" value="true" />
+        <entry key="ConfusedInheritance" value="true" />
+        <entry key="ConfusionBetweenInheritedAndOuterMethod" value="true" />
+        <entry key="CrossSiteScripting" value="true" />
+        <entry key="DefaultEncodingDetector" value="true" />
+        <entry key="DoInsideDoPrivileged" value="true" />
+        <entry key="DontCatchIllegalMonitorStateException" value="true" />
+        <entry key="DontIgnoreResultOfPutIfAbsent" value="true" />
+        <entry key="DontUseEnum" value="true" />
+        <entry key="DroppedException" value="true" />
+        <entry key="DumbMethodInvocations" value="true" />
+        <entry key="DumbMethods" value="true" />
+        <entry key="DuplicateBranches" value="true" />
+        <entry key="EmptyZipFileEntry" value="true" />
+        <entry key="EqualsOperandShouldHaveClassCompatibleWithThis" value="true" />
+        <entry key="ExplicitSerialization" value="true" />
+        <entry key="FieldItemSummary" value="true" />
+        <entry key="FinalizerNullsFields" value="true" />
+        <entry key="FindBadCast2" value="true" />
+        <entry key="FindBadForLoop" value="true" />
+        <entry key="FindBugsSummaryStats" value="true" />
+        <entry key="FindCircularDependencies" value="false" />
+        <entry key="FindDeadLocalStores" value="true" />
+        <entry key="FindDoubleCheck" value="true" />
+        <entry key="FindEmptySynchronizedBlock" value="true" />
+        <entry key="FindFieldSelfAssignment" value="true" />
+        <entry key="FindFinalizeInvocations" value="true" />
+        <entry key="FindFloatEquality" value="true" />
+        <entry key="FindFloatMath" value="false" />
+        <entry key="FindHEmismatch" value="true" />
+        <entry key="FindInconsistentSync2" value="true" />
+        <entry key="FindJSR166LockMonitorenter" value="true" />
+        <entry key="FindLocalSelfAssignment2" value="true" />
+        <entry key="FindMaskedFields" value="true" />
+        <entry key="FindMismatchedWaitOrNotify" value="true" />
+        <entry key="FindNakedNotify" value="true" />
+        <entry key="FindNonSerializableStoreIntoSession" value="false" />
+        <entry key="FindNonSerializableValuePassedToWriteObject" value="false" />
+        <entry key="FindNonShortCircuit" value="true" />
+        <entry key="FindNullDeref" value="true" />
+        <entry key="FindNullDerefsInvolvingNonShortCircuitEvaluation" value="true" />
+        <entry key="FindOpenStream" value="true" />
+        <entry key="FindPuzzlers" value="true" />
+        <entry key="FindRefComparison" value="true" />
+        <entry key="FindReturnRef" value="true" />
+        <entry key="FindRunInvocations" value="true" />
+        <entry key="FindSelfComparison" value="true" />
+        <entry key="FindSelfComparison2" value="true" />
+        <entry key="FindSleepWithLockHeld" value="true" />
+        <entry key="FindSpinLoop" value="true" />
+        <entry key="FindSqlInjection" value="true" />
+        <entry key="FindTwoLockWait" value="true" />
+        <entry key="FindUncalledPrivateMethods" value="true" />
+        <entry key="FindUnconditionalWait" value="true" />
+        <entry key="FindUninitializedGet" value="true" />
+        <entry key="FindUnrelatedTypesInGenericContainer" value="true" />
+        <entry key="FindUnreleasedLock" value="true" />
+        <entry key="FindUnsatisfiedObligation" value="true" />
+        <entry key="FindUnsyncGet" value="true" />
+        <entry key="FindUseOfNonSerializableValue" value="true" />
+        <entry key="FindUselessControlFlow" value="true" />
+        <entry key="FormatStringChecker" value="true" />
+        <entry key="FunctionsThatMightBeMistakenForProcedures" value="true" />
+        <entry key="HugeSharedStringConstants" value="true" />
+        <entry key="IDivResultCastToDouble" value="true" />
+        <entry key="IncompatMask" value="true" />
+        <entry key="InconsistentAnnotations" value="true" />
+        <entry key="InefficientMemberAccess" value="false" />
+        <entry key="InefficientToArray" value="true" />
+        <entry key="InfiniteLoop" value="true" />
+        <entry key="InfiniteRecursiveLoop" value="true" />
+        <entry key="InheritanceUnsafeGetResource" value="true" />
+        <entry key="InitializationChain" value="true" />
+        <entry key="InitializeNonnullFieldsInConstructor" value="true" />
+        <entry key="InstantiateStaticClass" value="true" />
+        <entry key="IntCast2LongAsInstant" value="true" />
+        <entry key="InvalidJUnitTest" value="true" />
+        <entry key="IteratorIdioms" value="true" />
+        <entry key="LazyInit" value="true" />
+        <entry key="LoadOfKnownNullValue" value="true" />
+        <entry key="LostLoggerDueToWeakReference" value="true" />
+        <entry key="MethodReturnCheck" value="true" />
+        <entry key="Methods" value="true" />
+        <entry key="MultithreadedInstanceAccess" value="true" />
+        <entry key="MutableLock" value="true" />
+        <entry key="MutableStaticFields" value="true" />
+        <entry key="Naming" value="true" />
+        <entry key="Noise" value="false" />
+        <entry key="NoiseNullDeref" value="false" />
+        <entry key="NoteAnnotationRetention" value="true" />
+        <entry key="NoteCheckReturnValueAnnotations" value="true" />
+        <entry key="NoteDirectlyRelevantTypeQualifiers" value="true" />
+        <entry key="NoteJCIPAnnotation" value="true" />
+        <entry key="NoteNonNullAnnotations" value="true" />
+        <entry key="NoteNonnullReturnValues" value="true" />
+        <entry key="NoteSuppressedWarnings" value="true" />
+        <entry key="NoteUnconditionalParamDerefs" value="true" />
+        <entry key="NumberConstructor" value="true" />
+        <entry key="OverridingEqualsNotSymmetrical" value="true" />
+        <entry key="PreferZeroLengthArrays" value="true" />
+        <entry key="PublicSemaphores" value="false" />
+        <entry key="QuestionableBooleanAssignment" value="true" />
+        <entry key="ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass" value="true" />
+        <entry key="ReadReturnShouldBeChecked" value="true" />
+        <entry key="RedundantInterfaces" value="true" />
+        <entry key="ReflectiveClasses" value="true" />
+        <entry key="RepeatedConditionals" value="true" />
+        <entry key="ResolveAllReferences" value="false" />
+        <entry key="RuntimeExceptionCapture" value="true" />
+        <entry key="SerializableIdiom" value="true" />
+        <entry key="StartInConstructor" value="true" />
+        <entry key="StaticCalendarDetector" value="true" />
+        <entry key="StringConcatenation" value="true" />
+        <entry key="SuperfluousInstanceOf" value="true" />
+        <entry key="SuspiciousThreadInterrupted" value="true" />
+        <entry key="SwitchFallthrough" value="true" />
+        <entry key="SynchronizationOnSharedBuiltinConstant" value="true" />
+        <entry key="SynchronizeAndNullCheckField" value="true" />
+        <entry key="SynchronizeOnClassLiteralNotGetClass" value="true" />
+        <entry key="SynchronizingOnContentsOfFieldToProtectField" value="true" />
+        <entry key="TestASM" value="false" />
+        <entry key="TestDataflowAnalysis" value="false" />
+        <entry key="TestingGround" value="false" />
+        <entry key="TestingGround2" value="false" />
+        <entry key="TrainFieldStoreTypes" value="true" />
+        <entry key="TrainLongInstantfParams" value="true" />
+        <entry key="TrainNonNullAnnotations" value="true" />
+        <entry key="TrainUnconditionalDerefParams" value="true" />
+        <entry key="URLProblems" value="true" />
+        <entry key="UncallableMethodOfAnonymousClass" value="true" />
+        <entry key="UnnecessaryMath" value="true" />
+        <entry key="UnreadFields" value="true" />
+        <entry key="UselessSubclassMethod" value="false" />
+        <entry key="VarArgsProblems" value="true" />
+        <entry key="VolatileUsage" value="true" />
+        <entry key="WaitInLoop" value="true" />
+        <entry key="WrongMapIterator" value="true" />
+        <entry key="XMLFactoryBypass" value="true" />
+      </map>
+    </option>
+  </component>
 </module>
\ No newline at end of file