Improve and update Gradle build

build.gradle

-/*
- * This file was generated by the Gradle 'init' task.
- *
- * This generated file contains a sample Java project to get you started.
- * For more details take a look at the Java Quickstart chapter in the Gradle
- * user guide available at https://docs.gradle.org/4.7/userguide/tutorial_java_projects.html
- */
-
 plugins {
     // Apply the java plugin to add support for Java
     id 'java'
@@ -13,41 +5,53 @@ plugins {
     // Apply the application plugin to add support for building an application
     id 'application'
 
-    id 'com.github.spotbugs' version "2.0.0"
+    id 'com.github.spotbugs' version '4.7.9'
 
     id 'checkstyle'
 
-    id "de.undercouch.download" version "4.0.0"
-
-    id 'groovy'
+    // Used by 'downloadTests' task below
+    id 'de.undercouch.download' version '4.1.2'
 }
 
+application {
     // Define the main class for the application
-mainClassName = 'de.hda.fbi.db2.Main'
+    mainClass.set('de.hda.fbi.db2.Main')
+}
 
-tasks.withType(com.github.spotbugs.SpotBugsTask) {
+spotbugs {
+    ignoreFailures = false
+    // Only cause failure for high priority issues
+    // Note: Currently this excludes all lower priority issues from report, see
+    // https://github.com/spotbugs/spotbugs-gradle-plugin/issues/14
+    reportLevel = 'high'
+    showStackTraces = false
+}
+tasks.withType(com.github.spotbugs.snom.SpotBugsTask) {
     reports {
-        xml.enabled = false
-        html.enabled = true
+        xml.required = false
+        html.required = true
     }
 }
 
 checkstyle {
-    toolVersion "8.29"
-    //configFile file("config/checkstyle/wso2_checks.xml")
-    //configFile file("config/checkstyle/sun_checks.xml")
-    configFile file("config/checkstyle/google_checks.xml")
+    toolVersion '8.29'
+    //configFile file('config/checkstyle/wso2_checks.xml')
+    //configFile file('config/checkstyle/sun_checks.xml')
+    configFile file('config/checkstyle/google_checks.xml')
 }
 
 tasks.withType(Checkstyle) {
     reports {
-        xml.enabled = false
-        html.enabled = true
+        xml.required = false
+        html.required = true
     }
 }
 
-/*
-task downloadTests() {
+tasks.register('downloadTestClasses') {
+    description('Replaces the local test classes with the test classes from the remote base '
+            + 'project. WARNING: This overwrites local changes!')
+
+    doLast {
         def unzipDir = new File('src/test/java/de/hda/fbi/db2/test')
         def gitURL = 'https://code.fbi.h-da.de/db2-praktikum/base-project/-/archive/master/base-project-master.zip?path=src%2Ftest%2Fjava%2Fde%2Fhda%2Ffbi%2Fdb2%2Ftest'
 
@@ -63,38 +67,35 @@ task downloadTests() {
 
         delete 'tests.zip'
     }
- */
-
+}
 
+// Specify Java version used to build this project
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(11)
+    }
+}
 
 dependencies {
-
-    // This dependency is found on compile classpath of this component and consumers.
-    compile 'com.google.guava:guava:23.0'
-
-    compile group: 'org.eclipse.persistence', name: 'javax.persistence', version: '2.2.1'
-
     // Use eclipselink JPA Implementation
-    compile('org.eclipse.persistence:eclipselink:2.7.4') {
-        exclude group: 'org.eclipse.persistence', module: 'jakarta.persistence'
-    }
-
-    //Oracle JDBC Driver and any other libraries from 'libs' folder since not available in public maven
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'org.eclipse.persistence:eclipselink:2.7.9'
 
     // https://mvnrepository.com/artifact/org.postgresql/postgresql
-    compile group: 'org.postgresql', name: 'postgresql', version: '42.2.1'
+    implementation 'org.postgresql:postgresql:42.3.1'
+
+    def spotBugsAnnotationsVersion = '4.5.0'
+    // SpotBugs annotations to suppress warnings about false positives
+    compileOnly "com.github.spotbugs:spotbugs-annotations:$spotBugsAnnotationsVersion"
+    testCompileOnly "com.github.spotbugs:spotbugs-annotations:$spotBugsAnnotationsVersion"
 
     // Use JUnit test framework
-    testCompile 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13.2'
 }
 
 
 // In this section you declare where to find the dependencies of your project
 repositories {
-    // Use jcenter for resolving your dependencies.
-    // You can declare any Maven/Ivy/file repository here.
-    jcenter()
+    mavenCentral()
 }
 
 // Attach stdin to gradle run

gradle/wrapper/gradle-wrapper.properties

-#Sat Mar 09 13:39:39 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip

gradlew

-#!/usr/bin/env sh
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 
 ##############################################################################
-##
-##  Gradle start up script for UN*X
-##
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # Attempt to set APP_HOME
+
 # Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
+APP_BASE_NAME=${0##*/}
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
         # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -81,7 +132,7 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
+    JAVACMD=java
     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
@@ -89,84 +140,95 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
 fi
 
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
         fi
-        i=$((i+1))
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
     done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
 fi
 
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=$(save "$@")
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
 
 exec "$JAVACMD" "$@"

gradlew.bat

+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -13,15 +29,18 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -35,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -45,28 +64,14 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell

src/main/java/de/hda/fbi/db2/api/Lab03Game.java

 package de.hda.fbi.db2.api;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.util.List;
 
 /**
@@ -35,6 +36,7 @@ public abstract class Lab03Game {
    *
    * @param lab02EntityManager lab02EntityManager
    */
+  @SuppressFBWarnings("EI_EXPOSE_REP2")
   public final void setLab02EntityManager(Lab02EntityManager lab02EntityManager) {
     this.lab02EntityManager = lab02EntityManager;
   }

src/main/java/de/hda/fbi/db2/api/Lab04MassData.java

 package de.hda.fbi.db2.api;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+
 /**
  * Api for MassData.
  */
@@ -38,6 +40,7 @@ public abstract class Lab04MassData {
    *
    * @param lab02EntityManager lab02EntityManager
    */
+  @SuppressFBWarnings("EI_EXPOSE_REP2")
   public final void setLab02EntityManager(Lab02EntityManager lab02EntityManager) {
     this.lab02EntityManager = lab02EntityManager;
   }
@@ -47,6 +50,7 @@ public abstract class Lab04MassData {
    *
    * @param lab03Game lab03Game
    */
+  @SuppressFBWarnings("EI_EXPOSE_REP2")
   public final void setLab03Game(Lab03Game lab03Game) {
     this.lab03Game = lab03Game;
   }

src/main/java/de/hda/fbi/db2/controller/Controller.java

@@ -4,6 +4,7 @@ import de.hda.fbi.db2.api.Lab01Data;
 import de.hda.fbi.db2.api.Lab02EntityManager;
 import de.hda.fbi.db2.api.Lab03Game;
 import de.hda.fbi.db2.api.Lab04MassData;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Constructor;
@@ -175,14 +176,17 @@ public class Controller {
     return lab01Data;
   }
 
+  @SuppressFBWarnings("EI_EXPOSE_REP")
   public Lab02EntityManager getLab02EntityManager() {
     return lab02EntityManager;
   }
 
+  @SuppressFBWarnings("EI_EXPOSE_REP")
   public Lab03Game getLab03Game() {
     return lab03Game;
   }
 
+  @SuppressFBWarnings("EI_EXPOSE_REP")
   public Lab04MassData getLab04MassData() {
     return lab04MassData;
   }

src/test/java/de/hda/fbi/db2/test/Lab02Test.java

@@ -9,6 +9,7 @@ import static org.junit.Assume.assumeNotNull;
 
 import de.hda.fbi.db2.api.Lab02EntityManager;
 import de.hda.fbi.db2.controller.Controller;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.util.List;
 import javax.persistence.metamodel.Attribute;
 import javax.persistence.metamodel.EntityType;
@@ -39,6 +40,7 @@ public class Lab02Test {
 
   private static EntityType<?> questionEntity;
 
+  @SuppressFBWarnings("UWF_UNWRITTEN_FIELD")
   private static EntityType<?> answerEntity;
 
   private static Controller controller;
@@ -88,6 +90,7 @@ public class Lab02Test {
     }
   }
 
+  @SuppressFBWarnings("ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD")
   @Test
   public void test1EntityManager() {
     try {
@@ -100,6 +103,7 @@ public class Lab02Test {
     }
   }
 
+  @SuppressFBWarnings("ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD")
   @Test
   public void test2FindCategory() {
     if (metaData == null) {
@@ -123,6 +127,7 @@ public class Lab02Test {
     fail("Could not find Category entity");
   }
 
+  @SuppressFBWarnings("ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD")
   @Test
   public void test3FindQuestion() {
     if (metaData == null) {
@@ -229,6 +234,7 @@ public class Lab02Test {
   }
 
   // Explicitly want to test `equals` implementation; ignore IntelliJ warnings about `equals` misuse
+  @SuppressFBWarnings("EC_NULL_ARG")
   @SuppressWarnings({"SimplifiableAssertion", "EqualsWithItself", "ConstantConditions"})
   private static void assertEqualsImplementation(Object a, Object b) {
     String className = a.getClass().getSimpleName();

src/test/java/de/hda/fbi/db2/test/Lab03Test.java

@@ -9,6 +9,7 @@ import static org.junit.Assume.assumeNotNull;
 import de.hda.fbi.db2.api.Lab01Data;
 import de.hda.fbi.db2.api.Lab03Game;
 import de.hda.fbi.db2.controller.Controller;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.util.ArrayList;
 import java.util.List;
 import javax.persistence.metamodel.EntityType;
@@ -97,6 +98,7 @@ public class Lab03Test {
     gameController.persistGame(game);
   }
 
+  @SuppressFBWarnings("ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD")
   @Test
   public void test2FindGameEntity() {
     if (metaData == null) {