checkstyle.xml: add 3 modules

Author: stephengold

config/checkstyle/checkstyle.xml

@@ -13,6 +13,10 @@
     <!-- See https://checkstyle.org/checks/javadoc/javadocpackage.html -->
     <module name="JavadocPackage"/>
 
+    <!-- Miscellaneous checks:                  -->
+    <!-- See https://checkstyle.org/checks/misc -->
+    <module name="NewlineAtEndOfFile"/>
+
     <!-- Check for trailing whitespace:                                 -->
     <!-- See https://checkstyle.org/checks/regexp/regexpsingleline.html -->
     <module name="RegexpSingleline">
@@ -84,6 +88,9 @@
         <module name="HideUtilityClassConstructor"/>
         <module name="InterfaceIsType"/>
         <module name="OneTopLevelClass"/>
+        <module name="ThrowsCount">
+            <property name="max" value="3"/>
+        </module>
 
         <!-- Checks for common coding problems:       -->
         <!-- See https://checkstyle.org/checks/coding -->
@@ -112,6 +119,7 @@
         <!-- Checks for imports:                       -->
         <!-- See https://checkstyle.org/checks/imports -->
         <module name="AvoidStarImport"/>
+        <module name="AvoidStaticImport"/>
         <module name="CustomImportOrder">
             <property name="customImportOrderRules" value="STATIC###THIRD_PARTY_PACKAGE"/>
             <property name="separateLineBetweenGroups" value="true"/>